Brake shoe placement...having trouble getting the shoes low enough
09-12-11, 05:10 PM
#1
My leg made the cover!
Thread Starter
Join Date: Dec 2007
Location: Franklin, IN
Posts: 459
Bikes: Trek, Arbourne, BMC, Orbea
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Brake shoe placement...having trouble getting the shoes low enough
All,
I'm having an issue getting the brake shoes low enough on the brake calipers to properly align with/hit the brake track on carbon tubular wheels, and wondering if anyone else had this issue. I'm using Dura Ace 7900 calipers, and the wheels are Zipp tubies (404 or 808 on front, Sub 9 in back). These are on a Cervelo P3C.
Any input is appreciated. I don't seem to have the issue with clinchers, but will verify to make sure I'm looking at this correctly.
Thanks,
Tom
I'm having an issue getting the brake shoes low enough on the brake calipers to properly align with/hit the brake track on carbon tubular wheels, and wondering if anyone else had this issue. I'm using Dura Ace 7900 calipers, and the wheels are Zipp tubies (404 or 808 on front, Sub 9 in back). These are on a Cervelo P3C.
Any input is appreciated. I don't seem to have the issue with clinchers, but will verify to make sure I'm looking at this correctly.
Thanks,
Tom
__________________
"If it first you don't succeed, try, try again. Then quit. There's no use being a damn fool about it." - W.C. Fields
"If it first you don't succeed, try, try again. Then quit. There's no use being a damn fool about it." - W.C. Fields
09-12-11, 08:55 PM
#3
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,706
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 140 Post(s)
Tagged: 1 Thread(s)
Quoted: 5781 Post(s)
Liked 2,576 Times
in
1,427 Posts
Front or back wheel? If the rear try reptilezs advice. Moving the wheel forward brings a higher part of the arc under the brake bridge.
If it's the front there's not much you can do, except file the slots to gain up to 2mm max. or replace the brakes with ones with longer reach, though I doubt your bike was built with long fork blades, so you need to look somewhere else.
If the shoe height isn't the same on both sides it's likely you have the arch canted to one side or the other. I've seen this a number of times and it has the effect of shortening the reach. Adjust the balancing screw so the arch is more symmetrical or looks like the pictures on Shimano or other sites. Then recenter the brake by swinging it on the pivot bolt and see if that buys you the distance you need.
If it's the front there's not much you can do, except file the slots to gain up to 2mm max. or replace the brakes with ones with longer reach, though I doubt your bike was built with long fork blades, so you need to look somewhere else.
If the shoe height isn't the same on both sides it's likely you have the arch canted to one side or the other. I've seen this a number of times and it has the effect of shortening the reach. Adjust the balancing screw so the arch is more symmetrical or looks like the pictures on Shimano or other sites. Then recenter the brake by swinging it on the pivot bolt and see if that buys you the distance you need.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Thread
Thread Starter
Forum
Replies
Last Post
The Golden Boy
Classic & Vintage
67
03-27-15 01:38 PM
Micah McDowell
Bicycle Mechanics
7
06-27-14 08:51 AM
