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Hayes MX4 mountain bike brakes - how to adjust?
Hi, can anyone help me? I've got a new bike with Hayes MX4 brakes, which I can't figure out how to adjust. the inner, fixed pad clears the disc just fine, but the outer moving pad drags on the disc. I can move the inner pad backwards and forwards by turning the allen screw on the inside by reaching through the wheel, but there doesn't seem to be an adjustment for the outer pad to move it further away from the disc, other than the cable to the lever. Even with this as slack as it will go, it still drags, and there is no travel mounting where the caliper is bolted to the fork.
Can anyone help? the Hayes website and I page instructions are useless and c**p!!!!
thanks,
Tim
thanks for the answer, thats really helpful. I did as you suggested, but with the inner pad backed off then tightened on half turn, the disk is still only 1/2mm away from the outer part of the bracket with the caliper pulled all the way out against the adjusting bolts. Does this mean the bracket is bent of something? there just isn't enough travel on the adjusting bolts to move the caliper into the right place!
4 Answers
- 1 decade agoFavorite Answer
Sounds like you need to move the whole brake caliper outwards.
Back the inner pad right off, then turn the adjust screw about half a turn.
Now loosen the bolts that attach the caliper to the frame/fork and move the whole caliper outwards so that the inner pad is just touching the brake rotor. Lightly tighten the bolts and check that the inner pad is just touching the rotor but not pushing against it, when it is evenly touching the rotor you can tighten the bolts back up. Once that's done back off the inner pad a little bit so the rotor will turn without rubbing on the pad.
The outer pad is adjusted by the cable length, turn the barrel adjuster on brake lever so that it is screwed right into the lever now loosen the screw attaching the cable to the caliper arm. When the caliper arm is in the fully open position pull the end of the cable so that it is tight when sitting on the arm and then tighten the screw that attaches it in place.
Hopefully everything will now work, by turning the barrel adjuster on the lever outwards this will move the outer pad inwards. The closer the outer pad is to the rotor the less the lever will have to be pulled. Adjust the lever pull to the way you like it.
- 6 years ago
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RE:
Hayes MX4 mountain bike brakes - how to adjust?
Hi, can anyone help me? I've got a new bike with Hayes MX4 brakes, which I can't figure out how to adjust. the inner, fixed pad clears the disc just fine, but the outer moving pad drags on the disc. I can move the inner pad backwards and forwards by turning the allen screw on the inside...
Source(s): hayes mx4 mountain bike brakes adjust: https://shortly.im/QXu28 - MicheleLv 45 years ago
You obviously don't know what you're doing. No offence, but you just bought it, take it back to Halfords. They should put it right as it wasn't right to start with. Mind you, don't expect to much, they sell car parts after all. This is why I continue to urge people to buy bikes from bike shops. Would you go to your butcher to buy a washing machine?
