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Old 09-11-2010, 07:00 AM   #1
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MTB to Road brake conversion

About 5 years ago, I put drop bars, bar ends and appropriate shifters on a Cannondale Caad2 MTB. Kept the Avid cantilever brakes. While the front brake was perfect the rear was mushy in the extreme. I used aero brake levers (Shimanos?) designed for this but was less than impressed with the results in the rear. Need to have better mechanical advantage at the lever or change the brakes. Anyone else do something similar or have suggestions on how to get a decent back brake out of this set-up?


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Old 09-17-2010, 04:53 AM   #2
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53 views and not one idea?


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Old 10-27-2010, 11:11 PM   #3
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93 views, still not one idea. i'm saddened and disheartened.
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Old 10-28-2010, 12:38 AM   #4
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questions

Are the pads up to par? Can the travel of levers be shortened? No great ideas, just trying to understand for myself why there is a different feel.
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Old 10-28-2010, 12:54 AM   #5
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thanks speedfan!

the pads are/were new so definitely up to the task. cables were new also.
don't know how i could shorten the lever travel.

the feel of the rear brake is mush as originally posted. i squeeze and it just feels soft all the way to the bar with some slight braking action. not enough to make me feel secure riding aggressively through city traffic. its like i don't have a sufficient mechanical advantage to get a good squeeze on the back rim. I installed Shimano Tiagra Aero levers which have (according to the late Sheldon Harris) the best mechanical advantage available and what Harris Cyclery suggested for my application.

any thoughts?
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Old 10-28-2010, 01:23 AM   #6
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I'm not well-versed on cantis, but can you shorten up the length of the hanger cable, or whatever you call it? That might give you more pad movement for a given lever travel.
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Old 10-28-2010, 03:02 AM   #7
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There used to be some little gizmos for this sort of situation. BRB, I gotta Google.
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Old 10-28-2010, 03:03 AM   #8
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Old 10-28-2010, 07:54 PM   #9
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Wasn't the little doo-hickey called a travel agent? I used them so that I could use some Grafton canti brake levers with linear pull brakes and they worked to perfection.
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Old 10-28-2010, 09:24 PM   #10
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Try to decrease the yoke angle - ( get the yoke cable close to the tire) See http://sheldonbrown.com/cantilever-geometry.html#mechanical for why yoke angle is important in getting the best mechanical advantage on cantilever brakes.

Also, consider trying a softer pad, like Kool Stop Salmon brake pads.

Those two changes made a world of difference in the Tektro cantis on my LHT



Last edited by LarryM; 10-28-2010 at 09:27 PM.
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