Phatmoto 2019 model Converting the V-brake to a rear disc brake
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- เผยแพร่เมื่อ 2 ต.ค. 2024
- Fitting a rear disc brake to a 2019 Phatmoto. The 2019 does not come with a rear disc set up, it has a weak, flimsy sub standard V- brake with shoes which will wear out in under a 100 miles. Causing rim damage. The cost is as follows: Sram Centerline rotor $39, 44 tooth sprocket $19, 203 mm post adapter $10, disc brake adapter $12, new stainless steel bolts/nuts, washers etc. $10, longer 60" brake cable $8. If you need a caliper additional cost??????
The sprocket that I'm using is dead flat (no dish). I don't know if the dished sprockets throw the alignment out, its one thing to consider when making this conversion.
Thank you for posting this!
Thanks for watching, if you do this conversion go Gasbike.net and get the 255 Monster rotor it comes with a mech. caliper for $49. That is a deal, why use the 255 mm rotor well it gives you more clearance to chain and separate s the rotor further from sprocket and chain so chain lube doesn't get on rotor. You'll need to space caliper up further, but easy with aluminium spacers from Ace Hardware.
@@beaubrummelmotorizedbicycles Thanks again for the info! :)
LAHover and Beau Brummel, my two favorite motorized bike channels! (But I'm hoping that LAHover gets over his fear and loathing for four strokes, however!! 😁)
Anything I recommend is what I did, it is what has worked for me. If you don't like it that is cool too. You need to research on your own and make the upgrades or changes that work for you and your riding style.
The stock Phatmoto pads are the same as Tektro iox novela pads. I say 10x in the video, but they are iox.
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10x is wrong in the video, it is iox novela pads, sorry for that mistake
6 months on... hows the disk with contamination from that chain.. or do you run the chain dry.. (as the smallest bit of oil on a disk renders it useless).
Several companies/privateers experimented with this back in the 80's with motor cross bikes, actually running the caliper on the sprocket as a combined disk and sprocket...
Great idea for weight saving on non sprung weight side of the suspension... but the brakes were useless by the end of a ride.
Very true there is a certain amount of contamination of chain oil on the disc. That is why I never upgraded the caliper to a more expensive unit. I run the very cheap stock caliper off the front. The pads are cheap. I also run the chain as dry as possible. I also take the pads out and lightly sand them with 220 paper, taking the oil glaze off. And I use alcohol on the disc to keep it clean. I rely mostly on the hydraulic front disc for the real stopping power. The rears work so-so mostly just as a slow down. They work about as good as the original stock v-brakes on the rear. You are the first you point this out, so you know your stuff.
@@beaubrummelmotorizedbicycles I had a friend's friend (Tony McMurdo) that raced top of class F3 on a zxr600 in a 400 frame.. He had an alloy rear disk with 50mm circular pads and 45mm holes in the disk breaking surface...
The bike would pass scrutineering but if he actually touched the rear brakes in a race the alloy disk would just disappear...
So from that you can gather how much rear brakes are of use in F3 racing.
I have an old '83 IT200 that has a drum rear that I would shim and get working but invariably would be dead before the end of a trail ride...
I was quicker into/through some corners on that than my current '99 YZ250.
Have you the room to fit a plastic disk between the sprocket and disk a bit like the old 10-speed rear wheel clear spoke protectors... (or at least a deflector on the caliper so no oil hits that and migrates back to the pads...)
You could be super fancy and mount your brakes on the other side of the shaft that runs your big intermediate sprocket... on the other side of the frame, away from the chain etc...
I would say excellent for unsprung weight saving...
q8) anyway, yes... go with the inboard brake!
@@TheButlerNZ I had the same question. I'll probably try to make a small deflector shield that preferably attaches to the brake caliper. For example, Magura 4 pistol calipers have the two openings for the pistons on each side on the outside with rings in them. A thin shield could be attached there.
Great video bro
Thanks for watching.
Any time bro
Every time he taps on something take a shot 😂
Yes, indeed, after you've done your approved repairs, upgrades, or maintenance. Just kidding, Thanks for watching.
Very nice man 😎. I just need the spacer
where did you get the rotor
I got it from either Amazon or Ebay, it is a Scram Centerline 220 mm rotor. If I was to do the conversion today I would use the 255 mm Monster rotor from gasbike.net because it gives extra clearance to chain and gets the rotor further away from possible contamination from chain lube. When I did the conversion no 255 mm rotors were available and when they were, they sold for $75, which is to much to pay. Gasbike has them for $49 with a mechanical caliper, a very good deal.
Where can I find that exact disk brake adapter? there are to many options
The disc brake adapter was sold by wilso 8276 on Ebay the hoop is 32mm but you don't use it,.You have to flatten out the slight offset by pounding it flat, I used a 3 lb. sledge hammer, then repainted it. The caliper adapter was sold by trantocycling it is a 7/8 mtb disc brake caliper adapter 180/203 mm rear. Both those items are made in USA. They cost a little more than the Chinese but are superior. Try those vendors on Ebay let me know if you can't find them.
I checked those sellers are no longer selling. I did do a search for both items and found them easy. The exact search wording was this: Bike Disc Brake Bracket Adapter Rotor Bicycle Mounting Holder MTB Tool USA. And the caliper adapter was this: 7/8 Inch MTB Disc Brake Rotor Mount Rear Post Caliper 180/203 mm Adapter US.
I have a felt faker gas frame and had thought about trying to install rear disk brakes.
They have the plate for the mounting of the disk brake caliper mechanism, but it looks like id either have to use a small sprocket with my nc sprocket adapter along with a huge rotor.
Makes me wonder why they even welded the bracket for it, lol
I guess I'll have to stick with a coaster brake 🤦
Anyhow I appreciate you, thanks for the video
Yup, you would need a smaller sprocket for chain clearance and a minimum 220 to 255 mm rotor.
Thanks for watching.
What pads are on the front?
The pads that fit the stock Phatmoto front caliper are the same as the Tektro iox, It can really get confusing with so many different pads out there, make sure the ones you get are shaped like a mini ping pong paddle. I say 10x, but that is wrong they are iox