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6 votes

mounting disk brake caliper problem: wheel doesn't spin freely, rubs outside pad, and caliper already as far to outside as possible

Conclusion (for anyone interested) The bike mechanic ended up taking the bike for a test ride and determined the brake caliper mounting surface on the fork was out of spec (too tilted) and resurfaced ...
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5 votes
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mounting disk brake caliper problem: wheel doesn't spin freely, rubs outside pad, and caliper already as far to outside as possible

Your problem may be that you're misunderstanding mechanical disc brakes. On most, only the outside pad moves, the disc is bent onto the inside pad. This means the loosen, clamp and tighten method ...
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4 votes

mounting disk brake caliper problem: wheel doesn't spin freely, rubs outside pad, and caliper already as far to outside as possible

I'm looking at the Hayes manual https://hayesbicycle.zendesk.com/hc/en-us/articles/360037399353-CX-MX-Mechanical-Brake for "how to mount caliper to fork". Oddly, it doesn't seem to specify ...
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4 votes

Mechanical disc brake scratching noise

I have found before that if you decide to do the quick release up tighter than usual it can tighten up the bearings a little too much and you might hear a fairly regular noise as the wheel rotates. I'...
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  • 561
3 votes
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Hydro disk brakes only work when pumped

So1es basically don't work and always have problems. If you already possessed the means to service them, the pads were functional, and you were only going to be down fluid and time after they still ...
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3 votes

Hydro disk brakes only work when pumped

Probably air in the lines. Assuming that's the case, yes, worth repairing. You'll need to bleed the brakes. To do that, you'll need the appropriate bleed kit. Probably $20 or so. Here's the service ...
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2 votes
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Removing and reseating front wheel makes disc brakes rub

Before you do anything else, confirm that the axle is properly seated in the dropouts. Unless the dropouts are resting solidly on the axle on both sides the wheel will be slightly cocked and it is ...
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  • 6,886
2 votes

Removing and reseating front wheel makes disc brakes rub

Ring the bike shop before doing anything. They may prefer you take it back to them rather than try to fix it yourself. All it probably needs a calliper alignment. Briefly - Loosen the two bolts ...
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  • 40k
2 votes

Mechanical disc brake scratching noise

If the sound is occurring once per revolution it must be related to the disc being at least slightly out of true. With the bike off the ground rotate the wheel and look at the disc in the caliper. ...
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1 vote

Mechanical disc brake scratching noise

I've had a similar experience where I thought it was something to do with my rotor, or dirt in my system. Took it all apart for cleaning & adjusted many times to try and sort it with no luck. ...
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  • 244

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