rear brake under chainstay pros and cons in general - scott foil rc specifically
Moderator: robbosmans
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and that is the other question-- when will the foil be updated? maybe i wait and see what scott comes up with for the update; it could be interesting in light of the UCI relaxing thd rules regarding frame design...Beaver wrote:Maybe the next generation will have the brake back on the seatstays.
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I have a BMC TMR02 with an under-BB mounted brake, set-up wasn't too bad, I have experiance with v-brake calipers and BMX U-brakes.
The thing to watch out for is corrosion from sweat, living in Queensland, Australia, you sweat alot, and this all flows down the downtube and onto the rear brake.
When I got my BMC (2nd hand) I took the rear brake apart and the tension springs etc were bone dry and rusty, needed to wide brush them and re-build with a thick grease on all moving parts, the brake was much better after doing this.
Power is still pretty poor, its not spongy but just on/off type feel with little modulation.
The thing to watch out for is corrosion from sweat, living in Queensland, Australia, you sweat alot, and this all flows down the downtube and onto the rear brake.
When I got my BMC (2nd hand) I took the rear brake apart and the tension springs etc were bone dry and rusty, needed to wide brush them and re-build with a thick grease on all moving parts, the brake was much better after doing this.
Power is still pretty poor, its not spongy but just on/off type feel with little modulation.
hey @adam0bmx0 -- the TMR02 brake is proprietary, right? i heard that that one was notoriously bad... the one that came on the trek madone 5.2 was actually pretty solid in my short experience with it, so proprietary can be ok... but it seems BMC missed big time with theirs. as for the sweat -- i had never thought of that!
@dastott -- what brake is on the merida reacto?
thanks!
@dastott -- what brake is on the merida reacto?
thanks!
That's what Scott told us, but Canyon did a comfortwise better job with the seatpost alone, so there's no real need for a bb mounted brake after all.
I have a 2016 Foil Premium frame I built up with DA9150 Di2 and DA9110 direct mount brakes. I have not had a problem with the rear brake whatsoever. If you clean and maintain your bike regularily it is not an issue. I also have Enve 5.6 wheels and the braking is perfectly fine as compared to my other rim brake bikes. I would not hesitate to buy one again.
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2021 Factor Ostro VAM
2021 Factor LS
2018 Trek Speed Concept
2021 Factor Ostro VAM
2021 Factor LS
2018 Trek Speed Concept
I have a 2016 Foil Premium frame I built up with DA9150 Di2 and DA9110 direct mount brakes. I have not had a problem with the rear brake whatsoever. If you clean and maintain your bike regularily it is not an issue. I also have Enve 5.6 wheels and the braking is perfectly fine as compared to my other rim brake bikes. I would not hesitate to buy one again.
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2021 Factor Ostro VAM
2021 Factor LS
2018 Trek Speed Concept
2021 Factor Ostro VAM
2021 Factor LS
2018 Trek Speed Concept
This is only the case for the first-gen Stages (not sure about the 4iiii, since I don't have one). I've had two different Stages PM's on my old Madone 5, and the 2nd gen Stages clears the brakes with room to spare.
Calnago is right, I can't really find a true "pro" on why these brakes exist. They don't provide a real aero benefit, and the brake action is not smooth, at all. I've tried everything I can think of, to improve the performance, and nothing makes it any better. At least Trek had the forsight to include an adjuster on the headtube, where the brake cable goes into the frame, so if you get any rubbing, you can open the brake, or adjust it, while riding.
That said, I wouldn't not buy a frame, just because it has the brakes under the chainstays, but I certainly wouldn't look for one with them there, either.
Madone 9 - https://bit.ly/2Nqedbn
Emonda SLR - https://bit.ly/2UK5FP8
Crockett - https://bit.ly/2Xem4sk
Emonda SLR - https://bit.ly/2UK5FP8
Crockett - https://bit.ly/2Xem4sk
this is an interesting comment.
jeffk's experience is telling, too -- maintenance, it seems, is key; keep the dura ace 9110 brake under that bb clean and it works.
does anyone have any experience with an eeBrake chainstay mounted brake?
My Merida Reacto 4000 comes with Shimano 105 direct mount brakes. TBH, I can't blame the rear brake solely for poor performance as I am running a Farsports carbon clincher on the back too. The Farsports carbon tubulars brake much better in my experience. The front brake, Shimano 105 direct mount, is good.
is that a size 56? how many CMs of spacers under the stem? i ride a 56 first gen foil with 2cm of spacers plus the 1cm headset cover, so i am just trying to envision what a new gen foil would look like in my setup.JeffK wrote: ↑Thu Jun 14, 2018 3:40 pmI have a 2016 Foil Premium frame I built up with DA9150 Di2 and DA9110 direct mount brakes. I have not had a problem with the rear brake whatsoever. If you clean and maintain your bike regularily it is not an issue. I also have Enve 5.6 wheels and the braking is perfectly fine as compared to my other rim brake bikes. I would not hesitate to buy one again.
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That said, I wouldn't not buy a frame, just because it has the brakes under the chainstays, but I certainly wouldn't look for one with them there, either.
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I agree with this. The Reacto 4000 is a very good value aero bike and I am very happy with it.
That said, I wouldn't not buy a frame, just because it has the brakes under the chainstays, but I certainly wouldn't look for one with them there, either.
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I agree with this. The Reacto 4000 is a very good value aero bike and I am very happy with it.
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