Bicycle Mechanics - bending brake springs by hand???

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.
Thumpic
10-18-10, 09:25 PM
I was having trouble getting a front brake to operate smoothly and returning to center. Upon closer inspection, I found the spring was way outawack. For the hell of it I tried to bend it by hand and was very surprised to find it fairly easy to correct. I also realize that it will probably will not stay corrected very long if it is so easy to bend.
Is this common?? Shouldn't they be stiffer??
Sixty Fiver
10-18-10, 09:42 PM
It is common practice to do this.
FastJake
10-18-10, 09:53 PM
It is common practice to do this.
Really?? I always feel like I'm doing something wrong when I bend those springs. But it has always worked for me.
kludgefudge
10-18-10, 10:07 PM
I'll stick with my patented $176.97 Park Tool Brand Brake spring bending tool thank you very much. Only foolish amateur bicycle mechanics would ever sink to using their hands to bend a spring.
Sixty Fiver
10-18-10, 10:22 PM
I'll stick with my patented $176.97 Park Tool Brand Brake spring bending tool thank you very much. Only foolish amateur bicycle mechanics would ever sink to using their hands to bend a spring.
:lol:
Park does make an overpriced tool for nearly everything.
fietsbob
10-19-10, 09:47 AM
... was something, not uncommon, to tweak on old centerpulls, back in the day.
urbanknight
10-19-10, 09:56 AM
That's how the head mechanic at the shop I worked for taught me to adjust V-brakes.
kingsting
10-19-10, 10:21 AM
I've been doing it for years too. Sometimes you get pinched when reassembling the brake and then have a fun little purple blood blister to pick at for a few days...
Bikewer
10-19-10, 11:25 AM
We bought several Smith & Wesson patrol bikes that all came with sub-par brakes (one of the low-end Avid units). I have to tweak the springs all the time.
Almost never with the Shimano units that come on the Trek police bikes.
canopus
10-19-10, 11:49 AM
An even nicer trick is to bend it on the flat section of the spring (closer to the ends) and not bend it at the round "spring" section. This makes the bend (and henceforth the spring action) last longer as on cheaper springs (and even dia-compes) you can eventually weaken the spring over time. We did this all the time on our BMX bikes. I had a friend that always accused me of having the best brake action around. We would do this and then drill out the brake and put in something like the suntour cyclone pivot bolts (that adjust from the rear) because the bolt was thicker and wouldn't flex. After those tweaks I just don't understand how anyone can complain about single pivot brakes. If they where just made that way to begin with...
I adjust my brakes all the time with my bare hands, as I switch wheelsets quite often. No problem at all.
Grand Bois
10-19-10, 07:25 PM
You sholdn't have to adjust the springs on your brakes when you change wheels.
Some older cantilevers can only be adjusted by bending the springs. The Dia compes on my Bridgestone, for instance.
corkscrew
10-19-10, 08:11 PM
I'll stick with my patented $176.97 Park Tool Brand Brake spring bending tool thank you very much. Only foolish amateur bicycle mechanics would ever sink to using their hands to bend a spring.
Ah yes, the coveted Park SB-1. I've been looking for one of those myself.
You sholdn't have to adjust the springs on your brakes when you change wheels.
Some older cantilevers can only be adjusted by bending the springs. The Dia compes on my Bridgestone, for instance.
My bad. I just forgot for a second that he was asking about springs rather than the brake calipers themselves.
Powered by vBulletin® Version 4.1.12 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.