Shimano HollowTech II 2X to 1X Conversion
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- เผยแพร่เมื่อ 27 ก.ค. 2024
- Today we're going to dive into our first tutorial, I recently did a 1x conversion on my bike and decided to do a step by step guide. The bike shed a full pound from this simple cheap mod.
This applies directly to Shimano HollowTech II cranks, but most other cranks are quite similar with the exception of the strategy for the remove and instalation from the bottom bracket. Hope this helps.
How to use a chain breaker:
• Crank brothers M19 cha...
If you want to purchase any of the required products and support my channel:
- Race Face Narrow Wide 104mm: amzn.to/2hao3dD
- ParkTool BBT 10.2: amzn.to/2h9A3yP
- ParkTool PPL-1 Grease: amzn.to/2gfLHZc
- Crank Brothers M19 (With Chain tool): amzn.to/2hk196F
- ParkTool 3-Way Allen Tool: amzn.to/2h9BJrY - กีฬา
Make sure when inserting chain in the rear derailleur it is placed before the cage stop and not behind it. It the video the chain was inserted incorrectly and that will cause rubbing against the aluminum.
Thanks Sandy, the pinned comment addresses this
Hello there, I just did this to my own bike using your tutorial, and it was easy. I don't think I would've done it without this vid. Thanks.
Happy you were able to pull it off. Kudos for taking the initiative to do it yourself
That video inadvertently drove me crazy :) Just so it might help someone that runs into the same problem: In this (2016) video the cranks used are as in the description stated Shimano HollowTech II cranks with a BCD of 104mm for the single chainring. Those XT cranks (FC-M785) look almost identically to newer XT cranks (M8000) which have a BCD of 96mm (thanks shimano) so that RaceFace would not fit. There's nothing wrong in the video. its awesome and totally applies still in 2018, just wanted to save someone the trouble of ordering a wrong BCD chainring.
Sorry to hear, would have never thought of it! Glad to hear you were able to solve this.
I would like i saw this comment earlier, i just god my chainring and saw its to small...
This video is exactly wgat i have been looking for for months and has answered all of my questions that i had. Thanks so much 💪🏼💪🏼👍👍
Happy you found it useful!
Am looking at 2018 leftover hardtails w/ 2x wanting to do an immediate 1x conversion for weight, since I'll mostly be doing long gravel grinders where every pound counts. Great video. Thanks.
thanks mate, well explained. I'm going to give this a go now
great video super detailed and easy to follow. thanks!
Thanks for the kind words. Hope it proves helpful to those thinking about converting.
Have that same toolbox! Nice Guide
Thanks Tyler! I've had that thing for like 10 years now, it's great, almost anything you can need.
Thanks a bunch for this video....just what I needed to update my son’s bike.
Glad it helped
excellent video. I have the same type of bike so this was a great "how to" for me. thank you
Happy it worked for you
Great video. I subscribed.
Getting ready to do this, great tutorial! What type of chain lube do you recommend?
Thanks for the video!
the most simple video on how to convert to 1x
Argh! Please, please do a tutorial on how to get over the fear of DYI-repairing one's mountain bike! Thank you for this! Will need to muster enough courage to tinker on my mountain bike, heeheee.
You're absolutely right, at first it is a little bit scary, but after a while you get to understand what's easy to do and what isn't. If you can judge your abilities none of this should be an issue, you just have to know when you want to go to the bike shop because its something you really can't do.
What a good guy, thanks mate
hey im looking to do this on my 3 by lot of usefull tips hope it will work
Hello, Love the videos great job!, I have a Giant Talon 3 3x9, would you think I can turn it into a 1x9?, I also live in Florida, Tampa to be exact and I would love to turn mine into a 1x, what would you recommend is the best setup?
Hey Victor, thanks! Tampa has some awesome riding near by, the ABC parks are intense.
You have to figure out what gear range you want first of all. Take a look at what gear you use the most in the front and if you only use one of them. That should be a good staring point as to what to aim for, I'd say a 32T front sounds about right. Regarding what you need to buy, you have to think how much of a conversion you want to do and what your budget it, you could take the opportunity to switch to 10 speeds, or maybe get an extended range 9 speed cassette (Sunrace makes a 11-40 which seems like a good option and more cost efficient than a 10 speed swap).
I'm very happy with the 36T front and a 11-36 10 speed rear, works well everywhere, but it takes a lot of power to move the bike on the steeper climbs, I switch out to a 32T when I travel north. They key thing is that you find a speed range that would work for you.
Hi, can I do this also to my shimano slx 2x11 (11-42t) with a 36-26t chainring crank? I would like it to be 1x with a 36t chainring?
Ok,hardtail front 34t-24t slx crankset,11t-42t slx cassette(11speed),Xt mech.
So basically i would leave the 34t on it and remove the 24t.
I wonder about spacers if they are needed?Simply to shift it to be near the frame so is less chain horizontal stretching.Sry for bad english...
It was pointed out to me I made a mistake around 8:20, the chain should go above the tab when going back into the derailleur cage, instead of below it as seen in the video.
Correct: twentynineinches.com/wp-content/uploads/2012/08/fuji-slm-6-12-004.jpg
Incorrect: i358.photobucket.com/albums/oo30/flafonta/Shimano3.jpg
As Narfelchen pointed out, take into account that newer HollowTech cranks may have a different BCD pattern. The XT cranks (FC-M785) show in this video are BCD104, the newer XT cranks (M8000) are BCD96.
yup, saw that one too...
Jogie Glen Mait yea haha.
Do you have to use a narrow wide chain as well? And if you will that work with the cassette? Thanx
I recently got into mountain biking with a entry bike from 2018, but i would like to change my chain ring from a 30T (SM-CRM70) to a 36 because we have LOTS of flat area here.
I only found 32 and 34T (From Shimano) for that crank (Shimano FC-M7000-11 Hollowtech II).
Does that mean i can only use those Shimano ones or are there ones from other brands that are compatible ?
Good tutorial, well done. My question is how happy are you with the loss in gearing, efficiency and durability?
I no longer have this bike. It served me well for the time I had it, no complaints. Knowing what I know now, and the pricing available on components today, I'd probably go for a cheap wide 11sp setup just to get some extra range.
Hey blindstuff,I notice fox suspension on the bike.My '16'trance 3 came with 32 sektor,and monarch.Which works but is not very confidence inspiring.Any thoughts?
Hey Robert, The 16 trance 3 is a great bike! Don't be put down by the components you're running, those are both great.
I think the single most important thing you can do is set them up properly, that will change them from kinda ok to feeling great. Take your time to play with the sag settings until you find a happy spot for yourself, for me its just around 30% to make the bike feel plushy, I basically like to go as plushy as possible that doesn't pedal bob or bottom out.
Once you have that, rebound is a key settings, it'll make the bike feel jumpy and unstable if its too fast, or sluggish and packing if its too slow.
Have you tried tinkering with those settings? I'm 99% sure you can get the bike to where you want without changing any parts.
A big Mahalo for the feedback and speedy reply.Will try more tinkering per your recommendations.
Glad to help. If you find yourself stuck don't hesitate to ask for help.
Also, I'd recommend you write your setup down somewhere every time you change it so you can go back if it doesn't work and that way you'll be more open to try changing it up a bit.
Hello is your crank set shimano deore XT FC M785?
What chain ring should i buy because i am going to convert my 3 by to 1. And i din’t know what chain ring i should by
My next bike would be for bikepacking and i'm set on single 36T NW upfront haha Rear min would be 11-40T to cover the climbs and i'm a fairly good climber so no monster 50T needed i think?
Gearing is super personal, everyone is different. If it were me, I'd try to get an 11sp 11-46T cassette just to make sure you have plenty of range to go along with that 36T. The 11sp can be had for much much less than the 50T 12 sp.
Can u use a shimano xt 3 ring crank and covert it to a 1 x 12 setup?
I though you had to change the rear cassette too if you do this, some made it sound like a lot more than just changing the front ring?
jdssurf good question. In my case I had a 10 speed setup already and was happy with the range it provided so I didn't change anything beyond the front ring. If you have, say an 8sp cassette, then in order to go 1x you should get a new cassette, since your buying, it's probably worth going 11sp cassette.
BlindstuffMTB thanks for the reply, pry will leave this bike a 2x for now, do a 1x for a downhiller later or something.
hey do you think i can go 1x10 or 1x11 with a 48 tooth chain ring and an 11-46 cassette? your video was quite informative btw, thanks!
A 48t chain ring is huge! Most people run a 32 or 34. But yes, the 11.46 is good, just go for a smaller front.
@@BlindstuffMTB the reason why im going for a 48 at the front is because in my 3x9 22,34,44 at front and 11-36 cassette, i almost never use the other chain rings except for the 44 and i still rarely use the 3 biggest cogs at the back. but still, thanks for your advice, i'll try thinking this through again
@@ianopalla7557 hey, you do you. If you're sure it fits you're needs go for it. I'd mainly be concerned about any kind of climbing with that setup. In the end, that's the beauty of customization, you can build what ever works for you.
@@ianopalla7557 I need to move where you live must be all down hill!
Hi, what cassette relationship do you have in the back? Did you make any adjustments to the chain or did you leave it as it was with both dishes?
I did not have to make any adjustments to the chain. But that really depends on what size sprocket you're gonna run. I had a 36 front which is not common at all. Most people will want to go with a 32.
Is this a press fit or threaded/bsa bb shell?
Saludos amigo. Soy de Florida .Boca Raton y lógico demasiado plano .tengo. 2x11
Cassette 11-42 .y. Platos sistema hallotech (26t- 36t). Quiero cambiar a solo 36t .
Mi pregunta : remuevo 26t (nunca usado aqui) solamente y .....que más debo hacer ? ( lógico ) aparte de remover la maneta y el desviador delantero .
I have the giant talon 4 which came with a 2x7 drivetrain. I’m on a budget so I would like to convert it to a 1x7 for now. I was wondering if that was possible and if so what kind of chainring should I get to convert
I would not recommend it with a 7 speed. You are not likely to have enough range with in chainring.
Ride it as is, you can do a 1x10 conversion later.
Is that front ring compatible with a XT (hollowtech) 3x ? Thank you in advance.
I'm sorry, I'm not sure about that. A 3x would probably be a pita to have in a conversion. You may want to change to a 1x crank.
Great video. What bike rack is that?
holden caulfied thanks! It's a kuat nv
Thanks Blindstuff.
Many Thanks for your Video, well explained ;) I have my heart set on a Giant Trance 2, have to save up money but I will be using mainly on flat roads but they're really bad Cambodia. Please! can you tell me what is the largest chainring, (you fitted a 36 T), I can fit and is there a way of spacing if I were to go 42 T or higher? Many Thanks in Advance and Kind Regards :)
I'm not sure what the largest size it'll fit is, but I'd say 36T is pretty large for a mountain bike, a 42T will be horrible in anything other than super fast perfectly flat asphalt.
Most people go with something like a 32T in the front and an 11sp rear to get a solid range that'll work almost anywhere.
Thank you for the reply, much appreciated ;)
hello,i have a 3x9 and shimano xt without clutch do you think that i will have chain drops
With no clutch you're likely to have some chain drops, even with a narrow wide. If you want to skip getting a derailleur with a clutch, you'd likely want to look into a chain guide.
Thanks!!
Can I do this to a giant talon 4? Or do you know
Hello, just wanna ask.. after you've converted your drivetrain into a 1x, does it have issues where if you shift unto to largest cog at the back and back pedal, the chain would come off?
No issues. You may have to adjust the limit screws on the derailleur a bit.
@@BlindstuffMTB Sometimes, my issue is the chain skipping back to the 2nd to the last cog or 3rd. Do you have thoughts on how to remedy that kind of issue? Some also told me it might be the chain alignment? :D not sure really
@@jessafemacuno8989 it could indeed be chain alignment. If that's the case you can solve it with spacers and different sized bolts.
I would try to fix it by adjusting the derailleur first though to make sure that it isn't something free first.
oh yes . and that crosschaining is awful , how the industry has brainwashed people into believing this is so good is actually amazing... but not as amazing as putting the world under house arrest with a bogeyman storey
Was the Raceface chainring pre-threaded? The ones I’m seeing, the 30t models are threaded, making me wonder if I will need different bolts than the stock Shimano 36/22 set up I have?
I honestly don't remember, but I think the 30t since its smaller, has different bolts to work with the 104bcd setup.
Thanks for the reply. I did some poking around and was informed the male portion of the 2 piece bolt from the original chainrings will work just fine. I'll update after attempting and I can actually verify.
What about changed chainline?
O wasn't an issue for me. The chain line will be basically the same as if you're using the big ring on the 2x.
Can you used old volts from stock chainring?
Almost always, yes. If you get a super small chainring, like a 28 probably no.
sir it is not any problem in chain linement i have 8 gear
What do you do to prevent the chain from dropping?
Derraileur with clutch and narrow wide chain ring.
Curious, why remove the crank? Isn't it possible to unbolt the chainrings and slide them out over the crank?
You won't be able to get the small ring off without removing the cranks.
I'm able to
Did he put the chain correctly under upper pully? Usually there is this nobe...or how to called, whatever,
Look at the pinned comment
A table knife works the same. Does not do damage.
Hello guys, just a quick question. I have 2015 Giant trance 3, and it has 2x10 drivetrain. I'm wondering if its compatible for an upgrade of 1x11 without having to change the free hub body on the back?
Thank you guys and have a wonderful day.
Can this be done in reverse? I have 1x on my new bike. Thinking about going to 2x
What's the motivation to going 2x? With current tech cassettes you can get the range you need with a 1x. 11 / 12 speed cassettes are amazing
@@BlindstuffMTB i ride a lot on the streets and i miss high gears for speed
Use a gearing calculator, you may be able to get away with running a larger chainring, something like a 36. If not, of course you can just buy 2x cranks, a derraileur and shifter, its uncommon but totally doable.
@@BlindstuffMTB ok thanks. My frame can only take a 32t max with a 1x. Now it's a 28t. So i can only go up to 30 or 32. Don't know if that will be good for me. I almost always ride the 3 highest gears now. With a 2x i can install 28-38. Maybe i will try 32 first before going to a 2x. Sorry for my bad spelling. I'm from belgium 😉
How does it climb
Any issue with chain line or is it identical to the 2x?
I dont have this bike anymore but used it for years like this without issue. Chainline was fine.
I have a 2x9 Cannondale Trail 6, my front derailer has a world of issues so I am thinking about swapping my 36/22 to a 1x 32t since I only use the 36t in my 2x anyways (climbs are brutal with the 36), do you think I will run into any issues with the rear derailleur or cassette?
Yeah, 36 is massive. A 30 o 32T works well for most everything, considering you have 9 gears you may want the 30 just to give you some more range. The only thing you have to consider is whether your derailleur has a clutch (I don't know of any 9sp that does), in which case you'd need to get a chain guide to avoid dropping the chain.
@@BlindstuffMTB Hey thanks for the response! My derailleur doesnt have a clutch so I realized this after I commented! I would probably have dropped chains. I think I'm going to do a 12spd cassette, new rear derailleur, chain, and shifter! All in all it isn't too expensive and I can still just pop a new chain ring on!
@@Filmingwithacarp The route you're taking is definitely better than just converting to 1x. Food for thought, in my experience, 11sp is more than enough if you want to save some cash. Unless you live in an area with very very very steep climbs. An 11sp cassette with a 46T max is a lot of range, very close to the 50T 12 speeds have and cheaper.
@@BlindstuffMTB Awesome, thanks for the info. Right now my front is a 22/36 9 speed but I can only use it in the 36t, climbing has been real hard as I'm in Utah and it's steep here but I've been getting by! 11 speed is not a bad idea, so far a Sunrace cassette and then the sram SX derailleur are pretty affordable, I'll have to see what an 11 speed setup would be though. Just about anything will help me climb at the moment :D
@@BlindstuffMTB Hey, on a side note how difficult will it be to replace the derailleur in the rear, new cable, cassette and chain ring? I haven't worked on a bike in probably 15+ years since I was a teenager :o
Hello i have the same bike i am looking to do the same to is there a way to make it 11X1 ?
Do all the steps here for the front. The rear you have to buy a 11sp cassette and shifter.
@@BlindstuffMTB thank bro and do you have any recommendations to buy ?
@@milovg5592 shimano slx m7000 is your best bet bang for the buck.
@@BlindstuffMTB thanks so much bro
Bro What is the size of your crank??
175mm cranks
could u go 1x12 with a XT shifter?
You'd have to buy the 12sp XT derraileur and shifter. It's all new for them so I don't know the exact details
Maybe i'll just stick with a 11 gear cassett but switch up to 46 ? should do the trick also i guess
@@clearlightcrystal this is definitely personal opinions, but what you're saying is more than enough, there have been very few situations where I've felt the need for a 12th speed. Having ridden both, I'm sticking to a wide range 11sp, cheaper, good enough and less chance of crushing the derailleur
you can actually remove those types of chain by using long nose pliers
You're absolutely correct, some people do find it easier to do like that.
*master link
Dont you need to cut the chain?? Coz you change to 2x to 1x.
Depends on the ratio of the front to rear sprockets. In my case the length was fine as is, but you _may_ need to change it
why the hell didn’t I watch this video three days ago. Just spent $500 in the GX Eagle 😞
It's all good! The GX eagle is amazing. The added range in the gears is nice to have if you live in a place with steep stuff
BlindstuffMTB so true...bay area
But how do you convince your parents
well done ...for ruining a perfectly good set up , previous owner done this to my bike, i would convert it back but i don't want to throw money at it . My first clunker had single speed,750mm wide bars 29''wheels because there were no mountain bikes , i wonder if we will go full circle and go back to those waffling about how you can ''really connect'' to the bike . I may start wearing jumbo cords again too, 1x isn't an upgade it's a compromise
Thank you Rocky, you've changed my view on life.
Hey, great video. I have a 2014 Santa Cruz nomad carbon. I’m trying to convert it to a 1x and it is a 2x10 would a race face narrow wide 32t work? Thankd
What cranks do you have? You need to check if they're 104 BCD or some other mounting style and get the correct narrow-wide based on that.