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Brake Pad Clearance Advice

Old 07-16-20, 02:17 AM
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bernauerstrasse
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Brake Pad Clearance Advice

Hi all,

I have a Raleigh bike with a Shimano Ultegra groupset - with Shimano Dual Pivot brake calipers on front and rear.

I want to set my brake pad clearance, and I understand that to do this one would turn the barrel adjuster down into the brake, giving the cable slack and moving the pads away from the rim.

However, my barrel adjuster is as tight as it can go - the spring is completely bunched up.

Does anyone know how I can fix this problem?

FYI - I took this into a bike shop two weeks ago to service my brakes, but I'd rather do this myself than have to bring it back in and pay money - any help really appreciated.

Thanks
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Old 07-16-20, 04:53 AM
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You can loosen the cable clamp bolt and release some cable, then tighten it up again. Then use the adjuster to fine tune. Then apply your brakes as hard as you can with both hands to confirm it will not slip.
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Old 07-16-20, 06:00 AM
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What was wrong with the clearance they set when you had the brakes serviced?
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Old 07-16-20, 06:11 AM
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Hi, ok thanks for the info Iíll try that and see how it goes.

the clearance was quite small, and after a couple of weeks the break pad has begun to constantly touch the rim

Iíve just centered the break calliper by using a screwdriver on the top screw a little which has helped somewhat in balancing out the clearance on left and right side - but Iíd still like some space on the barrel adjuster and it not to be fully wound up
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Old 07-16-20, 06:14 AM
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Originally Posted by bernauerstrasse View Post
Hi, ok thanks for the info Iíll try that and see how it goes.

the clearance was quite small, and after a couple of weeks the break pad has begun to constantly touch the rim

Iíve just centered the break calliper by using a screwdriver on the top screw a little which has helped somewhat in balancing out the clearance on left and right side - but Iíd still like some space on the barrel adjuster and it not to be fully wound up
If the pads are new you don't ned space on the barrel adjuster. The idea is that you should tighten it as the pads wear.
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Old 07-16-20, 06:58 AM
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Originally Posted by Amt0571 View Post
If the pads are new you don't ned space on the barrel adjuster. The idea is that you should tighten it as the pads wear.
Technically, you loosen the barrel adjuster to take up slack. The adjuster is unscrewed to make the outer cable longer compared to the inner cable.
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Old 07-16-20, 11:21 AM
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What you're probably experiencing is that the wheel has gone out of true after riding the bike a while. Does the brake rub consistently all the way around a full revolution of the wheel? Or does it rub just in certain places?
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Old 07-16-20, 12:50 PM
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Hi,

i think youíre right about the Wheel needing trueing. It only seems to touch the rim on certain parts.

thanks everyone for your input
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Old 07-16-20, 11:40 PM
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Originally Posted by cyccommute View Post
Technically, you loosen the barrel adjuster to take up slack. The adjuster is unscrewed to make the outer cable longer compared to the inner cable.
That's what I wanted to say. You're totally correct.
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Old 07-17-20, 07:39 AM
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Originally Posted by bernauerstrasse View Post
Hi,

i think youíre right about the Wheel needing trueing. It only seems to touch the rim on certain parts.

thanks everyone for your input
If you can take the wheel off and take it to your LBS they can true it for $15-$20 along with checking all the spokes. Important step when renewing brake pads.
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Old 07-17-20, 01:13 PM
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Originally Posted by Mutinyguy View Post
If you can take the wheel off and take it to your LBS they can true it for $15-$20 along with checking all the spokes. Important step when renewing brake pads.
what is the rational for truing when replacing brake pads? is this just like a 3,000* mile oil change sort of thing?

*7,500 for me based on Honda advice.
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