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Odd thing with ultegra front brake....(6 posts)

Odd thing with ultegra front brake....Geof
Jan 17, 2002 10:18 PM
Is there a toe adjustment on the ultegra brakes? If there is, I sure can't find it. The reason I ask is, this is the second set of Ultegra's (one on my wife's bike) that seems to have a major toe in on the right (looking down-rider's position) brake pad/caliper arm. I'm not sure if it's a problem with the cartridge pads or the calipers themselves. Any thoughts?

Also, how much better (if at all) are Dura Ace calipers in comparision?

Thanks.
Yeah, do yourself a favour and get some Campy. nmAlsatian
Jan 18, 2002 7:39 AM
Forget what the other idiot wrotePaul
Jan 18, 2002 8:57 AM
I have both Ultegra and dura ace brake calipers, and they are designed to be toe in slightly. This is to prevent squealing of the brakes when applied. You want the front part of the brake pad to hit the rim first, then the rest will be compressed against the rim wiht more pressure.

Now if yours is radically toed, I believe the problem is incorrectly installed calipers. When you apply the front brake, is the rim pushed in a direction from right to left? Do the brake pads strike the rim evenly? I just believe it's a skewing problem because it's the second pair you installed. Also, there is a small centering adjustment located on top of the caliper.

Hope I haven't been too basic.

Paul
the OTHER idiot?LOL!
Jan 18, 2002 9:50 AM
Forget what the other idiot wroteGeof
Jan 18, 2002 3:42 PM
Actually both calipers are installed and adjusted correctly. What the problem was (after removal and messing around) was a loose allen set screw in the middle pivot. It allowed the inner (or right) caliper arm to rotate with the tension of the spring. I checked the other and it was loose too. Don't ask me why, but they were. Anyway, they look good now with just the normal toe-in. I wonder why shimano doesn't make these cartridge brake shoes toe-in/out adjustable. I guess maybe a clearance issue.

Thanks.
re: ultegra front brake....Chen2
Jan 18, 2002 3:08 PM
We've got both Dura-Ace and Ultegra brakes and I don't see any difference in the toe between the left side and the right side. They should all have slight toe-in, left, right, front, & back. If you have a bent caliper take or send it back for a replacement. It is possible to bend them a bit but I would be very careful with that. BTW, they'll stop better and quieter if you replace the pads with KoolStop pads. Of course the rims and brakes should be centered. If the through bolt is loose the calipers will not stay centered.
-Al