Weak canti brakes on new Volpe
04-19-19, 06:56 AM
#51
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Anyway, here's a photo of the rear brake on my bike:
The front is similar, but I have a front rack that makes the power hanger etc harder to see.
For what it's worth, before I tried this I tried V-brakes, and went as far as buying two travel agents. The travel agent requires the brake cable to make a complete circle -- that is, where the cable would normally make a 90 degree turn, the travel agent adds another 360 so you end up with 450 degrees of bend in the cable, part of it a rather tight bend. On mine, this added just enough cable friction to throw off the balance of the brake return springs, and I was never able to get both sides of the brake to release from the rim evenly. I know there's a way to pre-bend the cable to greatly reduce the resulting cable friction, but I lost patience with the setup before I got it right.
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Last edited by rhm; 04-19-19 at 07:45 AM.
04-19-19, 07:44 AM
#53
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It's actually a "power hanger." I will go back and edit. Here is a link:
https://www.sjscycles.co.uk/brakes/t...rakes/?geoc=US
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04-19-19, 09:30 AM
#54
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Yes, that is true. This is a potential solution to some problems with cantilever brakes, and anyone looking to improve a cantilever brake setup should be aware of it. I mention it mainly for @imi's benefit. You are absolutely right to point out that it does not work in every case. To be clear, I am happy with this setup on my bike, but I have misgivings about it as well. Braking performance is much improved, but unhooking the brake (for removing the wheel etc) is more complicated. I had to change my brake levers to some Tektro levers that have a quick release, and even so, they don't release enough cable to solve this problem. And so on.
Anyway, here's a photo of the rear brake on my bike:
The front is similar, but I have a front rack that makes the power hanger etc harder to see.
For what it's worth, before I tried this I tried V-brakes, and went as far as buying two travel agents. The travel agent requires the brake cable to make a complete circle -- that is, where the cable would normally make a 90 degree turn, the travel agent adds another 360 so you end up with 450 degrees of bend in the cable, part of it a rather tight bend. On mine, this added just enough cable friction to throw off the balance of the brake return springs, and I was never able to get both sides of the brake to release from the rim evenly. I know there's a way to pre-bend the cable to greatly reduce the resulting cable friction, but I lost patience with the setup before I got it right.
Anyway, here's a photo of the rear brake on my bike:
The front is similar, but I have a front rack that makes the power hanger etc harder to see.
For what it's worth, before I tried this I tried V-brakes, and went as far as buying two travel agents. The travel agent requires the brake cable to make a complete circle -- that is, where the cable would normally make a 90 degree turn, the travel agent adds another 360 so you end up with 450 degrees of bend in the cable, part of it a rather tight bend. On mine, this added just enough cable friction to throw off the balance of the brake return springs, and I was never able to get both sides of the brake to release from the rim evenly. I know there's a way to pre-bend the cable to greatly reduce the resulting cable friction, but I lost patience with the setup before I got it right.
Thanks for posting, I have never seen one of those. Interesting.
04-19-19, 11:45 AM
#56
Banned
in L type calipers the short side is 20mm +/- the adjustment slot .. as the longer side of the L increases
the greater the MA of the caliper..
the greater the MA of the caliper..
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