brake rub problem
04-27-07, 09:50 AM
#1
Walks with a limp
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brake rub problem
I just bought a new (to me ) bike
it's running Exage sidepulls, and on both calipers, the brakes are really rubbing on the rims; it seems like the caliper bolts are not tightened enough, but also, the cables/housings are too long, and the brakes are a little tight. this problem seems worse after I pulled off both wheels and put them back on. any guidance is appreciated.
it's running Exage sidepulls, and on both calipers, the brakes are really rubbing on the rims; it seems like the caliper bolts are not tightened enough, but also, the cables/housings are too long, and the brakes are a little tight. this problem seems worse after I pulled off both wheels and put them back on. any guidance is appreciated.
04-27-07, 10:01 AM
#2
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Centering single-pivot sidepull brakes can be a pain, although it's still not too difficult. If the brakes are too tight (inhibiting the pivoting movement of the arms) then you'll need to loosen the center bolt with respect to the base (which sits against the front of the fork, probably uses a 14mm cone wrench to hold it).
You also need to use a wrench to hold this base in place (on my 105 single-pivot centepulls it's 14mm, sometimes you see 13mm and 10mm as well) in order to tighten the brake onto the fork and and rear brake onto its mounting spot on the stays. Use the proper-size cone wrench to rotate the brakes such that the pads are both equally far away from the rim. Then you won't get rubbing.
If the brake cable housing is really too long, this can apply pressure that pushes the brakes too far in one direction. So cut a bit off the cable housing then.
You also need to use a wrench to hold this base in place (on my 105 single-pivot centepulls it's 14mm, sometimes you see 13mm and 10mm as well) in order to tighten the brake onto the fork and and rear brake onto its mounting spot on the stays. Use the proper-size cone wrench to rotate the brakes such that the pads are both equally far away from the rim. Then you won't get rubbing.
If the brake cable housing is really too long, this can apply pressure that pushes the brakes too far in one direction. So cut a bit off the cable housing then.
__________________
"c" is not a unit that measures tire width
"c" is not a unit that measures tire width
04-30-07, 09:09 PM
#3
Walks with a limp
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Originally Posted by timcupery
Centering single-pivot sidepull brakes can be a pain, although it's still not too difficult. If the brakes are too tight (inhibiting the pivoting movement of the arms) then you'll need to loosen the center bolt with respect to the base (which sits against the front of the fork, probably uses a 14mm cone wrench to hold it).
You also need to use a wrench to hold this base in place (on my 105 single-pivot centepulls it's 14mm, sometimes you see 13mm and 10mm as well) in order to tighten the brake onto the fork and and rear brake onto its mounting spot on the stays. Use the proper-size cone wrench to rotate the brakes such that the pads are both equally far away from the rim. Then you won't get rubbing.
If the brake cable housing is really too long, this can apply pressure that pushes the brakes too far in one direction. So cut a bit off the cable housing then.
You also need to use a wrench to hold this base in place (on my 105 single-pivot centepulls it's 14mm, sometimes you see 13mm and 10mm as well) in order to tighten the brake onto the fork and and rear brake onto its mounting spot on the stays. Use the proper-size cone wrench to rotate the brakes such that the pads are both equally far away from the rim. Then you won't get rubbing.
If the brake cable housing is really too long, this can apply pressure that pushes the brakes too far in one direction. So cut a bit off the cable housing then.
