In 2019, during high Covid19 closure, I bought my only, but by then the former top, flame painted SuperlightM6LXBrompton! In Scandinavia it seems that all are with the long seat post as standard (we are generally tall people)! At first "free Service" I got my crank changed to a proper size, Chinese ceramic crank (It seems that Brompton has changed the width many times, as also the brakes? When I changed parts to titanium I had problems to find the right length for the titanium fastening bolts). I have found parts to make it lighter for now 9,35 kilo, but expect to come below 9 kilo, and still with mudguards!! The stays are from titanium but the clamps holding the stays and mudguards are from "Heavy Metal" too be changed to carbon and alu! I have gone up a steep serpentine road, and even the low gears wasn't enough, so I had to walk! But it was special enough to make me, not add a low option gear, as I find it a waste of money! Finn. Denmark
Might I suggest you use a little Blue Locktite when re assembling chainrings. If one of those bolts loosens up you will get a little ticking sound that will drive you out of your mind trying to figure out where it is coming from.
Tip.Tighten the cranks on with the original steel bolts then remove and replace with the Titanium bolts.This is definitely an upgrade i will consider for my summer Brompton.
I was wondering how common the Schlumpf Drive actually is. I recently bought a used Brompton 3-Speed from 2005 with a Schlumpf High Speed Drive as well as an E-Bike Conversion (ca. 8600km/5400miles on it). I would be curious to know if anyone was using the regular Speed Drive.🤔 The High Speed Version has some drawbacks, besides the price. The 27-thooth Chainring brings the chain very close to the Frame and the „gearbox“ actually touches the rear Triangle when folded. The heel shifting is pretty ingenious though.
I've tried to add spacers for my brompton JIS titanium bottom bracket before but the crank have side to side movement as JIS have separated spindle it isn't designed to be used with spacers. I've swapped out for hollowtech in the end so I can add the spacers. Much more solid bottom bracket. Might want to check yours
why are spacers needed for the chainring bolts? (I mean not the one for the bottom bracket) The original did not have it and it does not seem to be necessary?
But I've done the same before JIS bottom bracket isn't designed to run spacers so it had side to side movement. Better to change to something like hollowtech
I have changed my bottom bracket on my Lightweight into a ceramic titanium version, and I did look at a set like Yours, to be able to add more gears. So I'm glad to see it done. Finn Denmark.
Thanks! If you have specific goals or gearing your looking for, I would recommend contacting the nice people at Brommieplus. They specialize in gearing. I do miss my 6 Speed CHPT3 🥲
07:07 If you buy torque wrenches eg Park Tool TW-1.2, 5.2, & 6.2 and a Park Tool SBS-1.3 metric socket set (other brands are available) you’ll never ruin another bolt and/or thread by applying too much force. Contact the manufacturers of the parts if their documentation doesn’t state the required Nm (Newton metres) of torque to correctly install their products. To loosen the chain tension simply push the rear derailleur upward toward the chain stay, then lift the chain off the second jockey wheel and slowly release the spring tension in the derailleur (or it will fly back with a jolt). I noticed earlier you were ‘blaming’ the workstand for the bike moving, simply tighten the clamp. 08:07. Their video shows you can keep your hands clean by using your right foot to push down on the lower section of the chain to go from the 33T ring to the 54T, I’d prefer a front derailleur with appropriate lever and cable, but most are limited to a 16T range, though if H&H made a 44T / 20T combo for my 6-spd I might be interested.
Thanks for the info! I have a torque wrench. It was one of those purchases that I am glad I made and wished I made sooner. The workstand clamp moves no matter how tight I make it. I will upgrade to a better stand in the future. The foot method works okay. I haven't had the chance to use it much since I don't have hills where I live.
I'm curious what you mean by pushing down on a lower part of the chain. I can't see how that would shift backup to the larger chain ring? OH do you mean by peddling backwards with the left and pushing down with the right at the same time to get it to jump back up?
@@NoZenith Pushing down with the right foot causes the chain, in conjunction with the Brompton derailleur, to create resistance (the derailleur has a hidden spring creating tension between the 2 ‘arms’), this allows the chain to appear to ‘stretch’ (when in reality it goes slack due to lack of tension). This momentarily releases the tension keeping the chain on the chainrings, allowing your right foot to push down and move the chain to the right allowing it to pick up the teeth of the larger chainring. Then when you pedal forward again the tension of the chain on the teeth of the chainring will pull the rest of the chain onto the rest of the chainring under tension and voila! Probably takes some practice though.
@@NoZenith Absolutely. Most front derailleurs can handle a max teeth jump of 16, hence 16T. Schlumpf is simplistic in operation, but adds about 800gms in weight at the cost of about £900 (GBP), additionally you would need to have the drive-side of the bottom bracket ‘faced’ to accept the specialist Schlumpf unit. The other option to using your foot, is to stop and use a small stick or your finger to hook the chain from one ring to the other.
Thank you for the video. I am also thinking same upgrade for my Bro. Mine is M6L. You've already made comment you don't know how it works for the 6 speed. I want to use 33T for a claiming. :-)
This is awesome! Thank you so much for showing this. I just started doing my research to do something similar and yet I wasn't thinking to go for such a drastic difference in chainring. I'm going to have to brush up on gear range now. My Brompton came with the 12% gear reduction and I really wanted the standard gear ring when I test road bikes because I like that Top Gear... But this low gear is Featherlite and lovely to go up hills after my legs are tired from a ride and I'm thinking I might regret giving that up entirely? I'm not sure how much that 12% is going to affect the lower gear
Thanks! If you need more information on gears, I would recommend contacting Brommieplus. They specialize in the Brompton drivetrain and can set you up with the right gearing.
Thank you for the video. It is necessary to change out the bottom bracket (BB) to fit a double chainring like the H&H, or will the stock BB that comes with the Brommie work? Will the chain line still be good with the original BB? Patrick
You don't need to change the Bottom Bracket but the chain ring comes with a bottom bracket spacer so might need to put it onto the bottom bracket if the chain line is not centered. The chain will come close to the frame when riding the 33T so you may need to use the space to push the chain line out. You could also adjust this by using spacers on the rear cog (depending on the gears you have).
Thank you Sir again for the video. I made the installation of the H&H dual chainring without the spacer using the stock BB. Working well. I was wondering what you are doing for shifting from the 54T to 33T and vis-versa. Are you planning on installing/fitting a front derailleur, or are you going to do the “foot” manual shifting back and forth? Patrick
@@pjohara15How are getting on with your 54T dual chainring and stock BB with no spacers? Any problems or issues with the chain hitting the frame when using 33T?
🧑🏼🦲I have seen a few front derailleurs but I have no experience with it. You can try Brommieplus. They know alot about the drivetrain on Bromptons. There are asier ways to get more gears I believe.
I am not familiar with the ATS drive but it does look nice. It reminds me of the Schlumpf system I have seen many years ago. I wanted to keep this bike light weight. Also, I really don't have hills to climb here that I needed something that I would use often.
Thank you for your videos. I have enjoyed watching you make modifications to your Brompton's. It has, been a while since you made this video and you have had time to see what you like and don't like about this install. I am thinking about this 54t/33t chainring install for a S6L, replacing the 50t that came with the bike. Before I saw this I thought about installing a 39t chainring. Have you any experience with a 39t or 40t chainring? Which do you think you would prefer? Would you consider a 3x3 setup?
This chainring is actually pretty nice to have. I haven't had a hill that I could not conquer. If yo don't need to use it everyday then it works great. If you need the lower gears often then you will be better getting a smaller chainring until your within the range you desire (but top speed will be less). The lowest chainring I have used was a 48T and it was okay for slow riding.
@@BromptonFamilyTime Thank you for your response. I love these little bikes. There are hills in my area that require another gear or two sometimes. (Just bought a T-line 12-speed. Last week. Life is good.)
i just got the same chainring... do you have to change the bottom bracket? mine is not working well (it is clunky when I pedal)\... all I did was change the chainring, and did not put the spacer... i think that's my problem there
Another great video. Just for clarification the Park Tool 001-22 was replaced by the BBT-22. Also the CCP-2 was replaced by the CCP-22(Both works). What was the weight prior to replacing the BB and unibody? Was there a reason why you did not go full carbon crank/body and carbon ceramic BB for weight added savings ? Thanks
👨🏼🦲Hi SoloJoe! I bought the BB in a set and it came with Japanese bearings. I will get the ceramic BB next time. I love how smooth this BB is. The unibody weighed the same. The BB weighed about 100g lighter. I would like a carbon crank/body set in the future. I ride this bike daily and ride through dirt roads everyday so I didn't want something expensive that would get damaged. Do you have any recommendations on a good carbon crank/body set?
@@BromptonFamilyTime Understood . Daily NYC riding beats the heck out of the bikes. Great work on getting the weight down. I follow 781 and they have amazing builds. I haven’t done anything with the BB and Crank. Only replaced the rack, seat post, handle bar and nuts with titanium. We’ll see what the future brings. Thanks again for the amazing content 🚴🚴🚴
Next, I would love to see you do a video on installing a front derailleur for this chainring. I have seen photos of them but I would love to see exactly how to do it and which derailleur to install.
The chain length is the stock length. I only use the 33T when climbing up a steep hill. I never change gears with it for the reason you are stating. The chain slop would make it unreliable.
I don't have any experience on a three speed but I would imagine it would work. You will need to figure out if you need spacers or not. You can try to contact H&H and see if they have an answer (or a dealer).
A chain that fits a 54T will surely be too long for a 33T. Its about 8 links difference! The tensioner wont take up that amount. When I have tried to get away with it the chain jumps off.
My chain length is 102 but I have a 54T. Check out the video by 2bikes4adventure called upgrading your brompton gearing for more information on the chain length.
Do you have any recommendations on front derailleur options for this chainring setup, so one wouldn't need to make contact with the chain? I found this Campagnolo downtube friction shifter that my dad used to use on his road bike that I could probably use for that, if I could find a way to mount it.
That would be a nice addtion. There are alot of smart people on the brompton reddit forum that might know. Besides that it would be trial and error unless you can find an expert mechanic locally to you.
@@BromptonFamilyTime Gotcha. I'd use the front derailleur that is paired with that shifter but it looks too small, not enough capacity to support the 21-tooth difference of that duo chainring. While I was googling around for this, I also found a Litepro BCD130 53t-39t dual chainring that might work because of that 14-tooth difference, although the smaller ring might not be small enough. I guess I'd have to get my hands on one first so I can play with it.
Can you advise if it is possible to do the same upgrade on the 4 speed P Line using the same chain length (moving from a 50T) or if the chain length would have to be 102 link chain. How would it work when using the 44T and the chain length at 102 links?
Email Fantastic4Toys and see if he knows since he sells them he should be able to reach out to the maker. I don't have an answer because the rear triangle has been redesigned and also since it is a 4 speed you will have to worry about chain slop.
@@BromptonFamilyTime As named I hardly knew for what use I would have the low gears, till I met a very steep serpentine road, and then had to use them, going up. Going down again, with several total stops from a very high speed (The road had "cattle prevention tubes" crossing at intervals, which I had to pass on foot), I was afraid that this would be too much for my brakes, but honestly, my Brompton brakes never let me down! Finn. Denmark
Wax is so nice. I don't think I will go back. The T and Superlight are waxed now and I will change my steel one to a wax chain once the current chain wears out.
🧑🏼🦲 I actually used it for the first time on the next video. I don't have any hills where I live. The only thing I have been using it weekly for is maintenance. I lower the chain onto it so I can clean the main chainring and it is helpful. I am happy with it so far. I would buy it again since it doesn't add weight and will be useful for long steep hills that we plan on riding in during the summer.
This is extremely helpful. I did not understand how to install my H&H front chainring until I watched this. Thank you!
thank you very much, that was exactly what i was desperatly searching for and did not find any information on german web sites.
this is just the upgrade i'm looking for to help with lower gears on my p-line.
いつも楽しく拝見しています。
カスタムが止まりませんね〜
聴きやすいので英語の勉強にもなります‼️
もともと主人は10年ほど日本で小学生と中学生に英語を教える外国人ティーチャーをしていました。そう言ってもらえると本人も喜ぶと思います。伝えておきますね！☺️
はい、もう自転車カスタムマシンと化しています。笑
In 2019, during high Covid19 closure, I bought my only, but by then the former top, flame painted SuperlightM6LXBrompton! In Scandinavia it seems that all are with the long seat post as standard (we are generally tall people)! At first "free Service" I got my crank changed to a proper size, Chinese ceramic crank (It seems that Brompton has changed the width many times, as also the brakes? When I changed parts to titanium I had problems to find the right length for the titanium fastening bolts). I have found parts to make it lighter for now 9,35 kilo, but expect to come below 9 kilo, and still with mudguards!! The stays are from titanium but the clamps holding the stays and mudguards are from "Heavy Metal" too be changed to carbon and alu!
I have gone up a steep serpentine road, and even the low gears wasn't enough, so I had to walk! But it was special enough to make me, not add a low option gear, as I find it a waste of money! Finn. Denmark
I have a ceramic ball set also for my J.K headset cups, as all bolts and the axle and security parts has been changed to titanium!
Might I suggest you use a little Blue Locktite when re assembling chainrings. If one of those bolts loosens up you will get a little ticking sound that will drive you out of your mind trying to figure out where it is coming from.
Tip.Tighten the cranks on with the original steel bolts then remove and replace with the Titanium bolts.This is definitely an upgrade i will consider for my summer Brompton.
Exactly! I stripped my Ti bolt before learning lol.
Very nice and a lot cheaper than a Schlumpf drive.
The original one was 54T I assume, so no need to change the chain length.
Hi. We love your videos! Thanks for stopping by 🙂Yes I decided to keep the same chainring teeth size for that reason.
I was wondering how common the Schlumpf Drive actually is. I recently bought a used Brompton 3-Speed from 2005 with a Schlumpf High Speed Drive as well as an E-Bike Conversion (ca. 8600km/5400miles on it). I would be curious to know if anyone was using the regular Speed Drive.🤔 The High Speed Version has some drawbacks, besides the price. The 27-thooth Chainring brings the chain very close to the Frame and the „gearbox“ actually touches the rear Triangle when folded. The heel shifting is pretty ingenious though.
I had never heard of these! Just went and looked it up and it's very interesting. Going to do some more research on the Schlumpf drive
I've tried to add spacers for my brompton JIS titanium bottom bracket before but the crank have side to side movement as JIS have separated spindle it isn't designed to be used with spacers. I've swapped out for hollowtech in the end so I can add the spacers. Much more solid bottom bracket. Might want to check yours
すごい！！
ご自分で自転車をカスタムされてるんですね。私には到底できないので尊敬します！
あと、そのめちゃくちゃ割り切ったチェーンリングにもびっくりしましたｗ
Shuに伝えておきます！「軽量化させるんだ」と言って、世界各地からチタン製パーツを取り寄せてはコツコツとカスタムしています。私も「よくするなぁ。。。大丈夫かな？」と見てましたが、ちゃんと出来ているようです。先週末輪行の時にピンクの方と比べてあまりにもの重さの違いに驚きました。
why are spacers needed for the chainring bolts? (I mean not the one for the bottom bracket) The original did not have it and it does not seem to be necessary?
I'm guessing it's for the double chainring ?
But I've done the same before JIS bottom bracket isn't designed to run spacers so it had side to side movement. Better to change to something like hollowtech
Nice set of tools!
Half the fun is collecting tools! I hope I will have all the tools to do all the work on the Brompton.
I have changed my bottom bracket on my Lightweight into a ceramic titanium version, and I did look at a set like Yours, to be able to add more gears. So I'm glad to see it done. Finn Denmark.
Nice. I have the Japanese bearings and it is super smooth. I will definitely try the ceramic version next.
@@BromptonFamilyTime Hi, I'm hesitating with the ceramic - understand is more fragile, what's your conclusion on them ?
Thanks for the video. Very useful as I'm thinking of doing the same mod to my 6-speed Superlight.
Thanks! If you have specific goals or gearing your looking for, I would recommend contacting the nice people at Brommieplus. They specialize in gearing. I do miss my 6 Speed CHPT3 🥲
Great video thanks 😊
Manual front derailleur
07:07 If you buy torque wrenches eg Park Tool TW-1.2, 5.2, & 6.2 and a Park Tool SBS-1.3 metric socket set (other brands are available) you’ll never ruin another bolt and/or thread by applying too much force. Contact the manufacturers of the parts if their documentation doesn’t state the required Nm (Newton metres) of torque to correctly install their products.
To loosen the chain tension simply push the rear derailleur upward toward the chain stay, then lift the chain off the second jockey wheel and slowly release the spring tension in the derailleur (or it will fly back with a jolt).
I noticed earlier you were ‘blaming’ the workstand for the bike moving, simply tighten the clamp.
08:07. Their video shows you can keep your hands clean by using your right foot to push down on the lower section of the chain to go from the 33T ring to the 54T, I’d prefer a front derailleur with appropriate lever and cable, but most are limited to a 16T range, though if H&H made a 44T / 20T combo for my 6-spd I might be interested.
Thanks for the info!
I have a torque wrench. It was one of those purchases that I am glad I made and wished I made sooner.
The workstand clamp moves no matter how tight I make it. I will upgrade to a better stand in the future.
The foot method works okay. I haven't had the chance to use it much since I don't have hills where I live.
I'm curious what you mean by pushing down on a lower part of the chain. I can't see how that would shift backup to the larger chain ring? OH do you mean by peddling backwards with the left and pushing down with the right at the same time to get it to jump back up?
@@NoZenith Pushing down with the right foot causes the chain, in conjunction with the Brompton derailleur, to create resistance (the derailleur has a hidden spring creating tension between the 2 ‘arms’), this allows the chain to appear to ‘stretch’ (when in reality it goes slack due to lack of tension). This momentarily releases the tension keeping the chain on the chainrings, allowing your right foot to push down and move the chain to the right allowing it to pick up the teeth of the larger chainring. Then when you pedal forward again the tension of the chain on the teeth of the chainring will pull the rest of the chain onto the rest of the chainring under tension and voila! Probably takes some practice though.
@Platypus Hatstand I think I can picture it. That would be neat and a lot less faff and expense than getting a front derailier or a schlumph drive
@@NoZenith Absolutely. Most front derailleurs can handle a max teeth jump of 16, hence 16T. Schlumpf is simplistic in operation, but adds about 800gms in weight at the cost of about £900 (GBP), additionally you would need to have the drive-side of the bottom bracket ‘faced’ to accept the specialist Schlumpf unit. The other option to using your foot, is to stop and use a small stick or your finger to hook the chain from one ring to the other.
Thank you for the video. I am also thinking same upgrade for my Bro. Mine is M6L. You've already made comment you don't know how it works for the 6 speed. I want to use 33T for a claiming. :-)
It should work fine but you may need to use spacers to adjust the chain line. It's not hard to figure out if you have the right tools.
This is awesome! Thank you so much for showing this. I just started doing my research to do something similar and yet I wasn't thinking to go for such a drastic difference in chainring. I'm going to have to brush up on gear range now. My Brompton came with the 12% gear reduction and I really wanted the standard gear ring when I test road bikes because I like that Top Gear... But this low gear is Featherlite and lovely to go up hills after my legs are tired from a ride and I'm thinking I might regret giving that up entirely? I'm not sure how much that 12% is going to affect the lower gear
Thanks! If you need more information on gears, I would recommend contacting Brommieplus. They specialize in the Brompton drivetrain and can set you up with the right gearing.
@@BromptonFamilyTime thank you!
This is fantastic! Thanks! Before you installed the Ti bottom bracket did you get the bottom bracket of the frame chased and faced?
No there was no problem installing this. I know a few BB require the threads chased like the Phil Wood.
@@BromptonFamilyTime Thanks! I really appreciate it and everything on this site.
Thank you for the video. It is necessary to change out the bottom bracket (BB) to fit a double chainring like the H&H, or will the stock BB that comes with the Brommie work? Will the chain line still be good with the original BB? Patrick
You don't need to change the Bottom Bracket but the chain ring comes with a bottom bracket spacer so might need to put it onto the bottom bracket if the chain line is not centered. The chain will come close to the frame when riding the 33T so you may need to use the space to push the chain line out. You could also adjust this by using spacers on the rear cog (depending on the gears you have).
Thank you Sir again for the video. I made the installation of the H&H dual chainring without the spacer using the stock BB. Working well. I was wondering what you are doing for shifting from the 54T to 33T and vis-versa. Are you planning on installing/fitting a front derailleur, or are you going to do the “foot” manual shifting back and forth? Patrick
@@pjohara15 I am doing the foot method. I rarely use the 33T in my area. There are occasional hills that I can use it so that is why I got it.
@@pjohara15How are getting on with your 54T dual chainring and stock BB with no spacers? Any problems or issues with the chain hitting the frame when using 33T?
is it possible to fit a front derailleur? im guessing it would involve some pretty hefty modifications??
🧑🏼🦲I have seen a few front derailleurs but I have no experience with it. You can try Brommieplus. They know alot about the drivetrain on Bromptons. There are asier ways to get more gears I believe.
Other than cleaning advantage did you choose this instead of the ATS drive for any reason?
I am not familiar with the ATS drive but it does look nice. It reminds me of the Schlumpf system I have seen many years ago. I wanted to keep this bike light weight. Also, I really don't have hills to climb here that I needed something that I would use often.
Thank you for your videos. I have enjoyed watching you make modifications to your Brompton's. It has, been a while since you made this video and you have had time to see what you like and don't like about this install. I am thinking about this 54t/33t chainring install for a S6L, replacing the 50t that came with the bike. Before I saw this I thought about installing a 39t chainring. Have you any experience with a 39t or 40t chainring? Which do you think you would prefer? Would you consider a 3x3 setup?
This chainring is actually pretty nice to have. I haven't had a hill that I could not conquer. If yo don't need to use it everyday then it works great. If you need the lower gears often then you will be better getting a smaller chainring until your within the range you desire (but top speed will be less). The lowest chainring I have used was a 48T and it was okay for slow riding.
@@BromptonFamilyTime Thank you for your response. I love these little bikes. There are hills in my area that require another gear or two sometimes. (Just bought a T-line 12-speed. Last week. Life is good.)
Nice I will get the 12 speed in the future. It really does look like it solves the gearing that most people want in a bike.
Where I can got that nice light double chainring ?
www.fantastic4toys.com/products/h-h-bcd130-54-33t-unibody-cnc-duo-chainring-for-brompton-bicycle?_pos=12&_sid=57cb69b53&_ss=r
i just got the same chainring... do you have to change the bottom bracket? mine is not working well (it is clunky when I pedal)\... all I did was change the chainring, and did not put the spacer... i think that's my problem there
UPDATE: YES YOU NEED TO USE THE SPACER. THE CHAIN WILL HIT THE FRAME IF YOU DON'T
Nice!
just curious how much weight was the difference between the two parts?
I don't remember the weight of the original. The Dual Chainring weights 124 grams.
Another great video. Just for clarification the Park Tool 001-22 was replaced by the BBT-22. Also the CCP-2 was replaced by the CCP-22(Both works). What was the weight prior to replacing the BB and unibody? Was there a reason why you did not go full carbon crank/body and carbon ceramic BB for weight added savings ? Thanks
👨🏼🦲Hi SoloJoe! I bought the BB in a set and it came with Japanese bearings. I will get the ceramic BB next time. I love how smooth this BB is. The unibody weighed the same. The BB weighed about 100g lighter. I would like a carbon crank/body set in the future. I ride this bike daily and ride through dirt roads everyday so I didn't want something expensive that would get damaged. Do you have any recommendations on a good carbon crank/body set?
@@BromptonFamilyTime Understood . Daily NYC riding beats the heck out of the bikes. Great work on getting the weight down. I follow 781 and they have amazing builds. I haven’t done anything with the BB and Crank. Only replaced the rack, seat post, handle bar and nuts with titanium. We’ll see what the future brings. Thanks again for the amazing content 🚴🚴🚴
Can I use this chainrings to my brompton m6l and do I need adjust or remove some chain link i have 50t? Thanks
🧑🏼🦲 You need more gears than the 6 speed? You would need to change the links since it is a 54T. I am not sure how well it would work on the 6 speed.
Next, I would love to see you do a video on installing a front derailleur for this chainring. I have seen photos of them but I would love to see exactly how to do it and which derailleur to install.
How many links does your chain have? I'm finding when i switch to 33T chainring my gearing goes all over the place when i switch back to the 54T
The chain length is the stock length. I only use the 33T when climbing up a steep hill. I never change gears with it for the reason you are stating. The chain slop would make it unreliable.
Will this dual chain ring work on a 2013 Three speed Brompton?
I don't have any experience on a three speed but I would imagine it would work. You will need to figure out if you need spacers or not. You can try to contact H&H and see if they have an answer (or a dealer).
A chain that fits a 54T will surely be too long for a 33T. Its about 8 links difference! The tensioner wont take up that amount. When I have tried to get away with it the chain jumps off.
I haven't had any problems, but I only use it for going over steep hills and then switch back.
How long is the Chain. I have a 6 speed C line 50T chain ring
My chain length is 102 but I have a 54T. Check out the video by 2bikes4adventure called upgrading your brompton gearing for more information on the chain length.
Do you have any recommendations on front derailleur options for this chainring setup, so one wouldn't need to make contact with the chain? I found this Campagnolo downtube friction shifter that my dad used to use on his road bike that I could probably use for that, if I could find a way to mount it.
That would be a nice addtion. There are alot of smart people on the brompton reddit forum that might know. Besides that it would be trial and error unless you can find an expert mechanic locally to you.
@@BromptonFamilyTime Gotcha. I'd use the front derailleur that is paired with that shifter but it looks too small, not enough capacity to support the 21-tooth difference of that duo chainring. While I was googling around for this, I also found a Litepro BCD130 53t-39t dual chainring that might work because of that 14-tooth difference, although the smaller ring might not be small enough. I guess I'd have to get my hands on one first so I can play with it.
Can you advise if it is possible to do the same upgrade on the 4 speed P Line using the same chain length (moving from a 50T) or if the chain length would have to be 102 link chain. How would it work when using the 44T and the chain length at 102 links?
Email Fantastic4Toys and see if he knows since he sells them he should be able to reach out to the maker. I don't have an answer because the rear triangle has been redesigned and also since it is a 4 speed you will have to worry about chain slop.
And I think I have seen a changer on the frame, for the front also?
The front Chainring is manual. I don't use it often but it is nice to know I have the option.
@@BromptonFamilyTime As named I hardly knew for what use I would have the low gears, till I met a very steep serpentine road, and then had to use them, going up. Going down again, with several total stops from a very high speed (The road had "cattle prevention tubes" crossing at intervals, which I had to pass on foot), I was afraid that this would be too much for my brakes, but honestly, my Brompton brakes never let me down! Finn. Denmark
excuse me, where did you buy that double chainring?
www.fantastic4toys.com
Can’t we use the stock BB for the new H&H chainring?
The stock should work, but you will still need to add the spacer to it.
What size is the front chainring?
BCD 130 54/33T
Switch to waxed chains and you won't even get dirty shoes or hands when changing the chainring while riding.
Wax is so nice. I don't think I will go back. The T and Superlight are waxed now and I will change my steel one to a wax chain once the current chain wears out.
Awesome ...I want this chainring bcd130,54/33t. Please put in market place lazada .so we can buy from Indonesia. make 53t/24t like this can u ..
I believe you have H&H dealers in Indonesia. Just ask them to bring the product to Indonesia if they haven't.
Are you finding this genuinely useful?
🧑🏼🦲 I actually used it for the first time on the next video. I don't have any hills where I live. The only thing I have been using it weekly for is maintenance. I lower the chain onto it so I can clean the main chainring and it is helpful. I am happy with it so far. I would buy it again since it doesn't add weight and will be useful for long steep hills that we plan on riding in during the summer.