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Roller cam brakes to canti's?

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Roller cam brakes to canti's?

Old 06-14-14, 04:34 PM
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AST236
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Roller cam brakes to canti's?

The mid 80's Peugeot Canyon Express I just picked up has roller cam actuated brakes. The bosses seem similar, so I'm wondering if I could replace them w/ newer cantilever brakes. The cable routings seem ok for canti's...

Thanks,

Frank
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Old 06-14-14, 04:57 PM
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Roller cam Pivots are above the rim.. so you may get a U brake to work , but not cantilevers , because then frame pivot has to be below the rim, ie closer to the axle.


of course you can hire a frame builder's shop, to remove the pivots , and braze them back on where the have to be for cantilevers or V brakes ..
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Old 06-14-14, 05:04 PM
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AST236
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Got it. Thanks! I may tinker w/ the roller cams before I make a decision.....
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Old 06-14-14, 05:48 PM
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Originally Posted by AST236 View Post
Got it. Thanks! I may tinker w/ the roller cams before I make a decision.....
When they are set up right, roller cams are great brakes. The key is to have the throw adjusted so the roller is at the sweet spot when the shoes first tough the rims, and so the cam never reaches the end stop (where it flares out) with the brake on full.

Because rims and shoes vary, it's often necessary to use washers to move the shoes close to the rim to get them set right.

This need to set the travel, by way of adjusting shoe/rim clearance with washers is what made these lose their cachet. Another example of a good idea that didn't wok because people don't know how to set it up correctly.
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Old 06-14-14, 09:11 PM
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Originally Posted by FBinNY View Post
... Another example of a good idea that didn't wo(r)k because people don't know how to set it up correctly.
amused
nowadays cantis seem to have same fate, displaced by V-brakes and disks

one of only 2 mechanics in a 5 mech shop who can setup cantis properly
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Old 06-15-14, 08:58 AM
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Charlie Cunningham of WTB, who sold rights to have the roller cam brake copied , Had even more complicated brake designs..
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