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Cantilever Brake Pad Attachment Variations

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Cantilever Brake Pad Attachment Variations

Old 09-16-13, 12:38 PM
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Ronno6
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Cantilever Brake Pad Attachment Variations

More fun with cantilever brakes.
I acquired a bike with Dia Compe cantilevers that are made of plastic.
I attempted to replace these with a set of Tektros, but the new brakes have the pad attachment
points aft of the lever arms on the fronts, and ahead of the arms on the rear.
This moves the pads to locations in which there is interference with the fork blades or seatstays.
The original brakes have the pad attachment point ahead of the arm (front) and vice-versa for the rear,locating the
pads farther away and clear of the frame and fork structures.
I have also seen designs which appear to have the pad attachment pretty much on the same plane as the arm pivot.
Is there nomenclature for these different configurations, or do I just need to look at pictures of any intended replacements?
Are there "road" vs. "mountain" vs. "cyclecross" variations of cantilevers that would exemplify the different designs?
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Old 09-16-13, 02:25 PM
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bolt on stud type shoes are a short or long bolt

V brakes use a Long bolt

some shoes use a threaded pad holder then the bolt is threaded into, those the length of bolts is optional .
if the original one doesn't work go get a longer bolt.

the other type is Mafac Based and is a Plain post with a draw bolt that holds it.
several variants on that draw bolt ..
a long and short pad variation ..

submit pictures of your stuff for better answers.
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Old 09-16-13, 02:44 PM
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there are a number of variations, but no rules about what is made for what. If it fits it's good.

Good design puts the pads as far back as possible to reduce spreading forces on the bosses, but that can interfere with fork blades, especially suspension stanchions. Moving the pads forward for better fork clearance can spread the bosses more causing chatter, squeal or shudder. Some companies offer low profile (thinner) shoes to solve the fork clearance issue, others simply use a shorter shoe.

More possibilities than anyone can count, so if you're DIY, I suggest getting the shoes back as far as fork clearance allows, but it's your call.
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Old 09-16-13, 03:24 PM
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I did actually get the Tektro's to fit. Due to the aforementioned thin pads the clearance is not an issue.
However, I need to do a bit more adjusting (fiddling) with the front brakes, as the bike was equipped with 27" wheels, and the front
pads don't quite hit the 700c"s like they should.
But, that's a different issue.
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Old 09-16-13, 09:51 PM
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Older forks pivots for cantilever brakes are closer together.. got 2 like that/,,
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Old 09-18-13, 05:40 AM
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For the time being I have put a set of 27 inchers on the bike.
I just could not get the brake pads to hit the front rim the way I liked.
Rear was no issue.
I may opt for a different set of brakes, or, I may take a spare fork and have cantilever mounts brazed on.
The current fork is pretty scratched up anyway.
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Old 09-18-13, 09:03 AM
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that radial difference , again.
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