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alligning disk rotor??

Old 11-02-07, 05:06 PM
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jamie jamie jam
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alligning disk rotor??

on my hayes hydraulic disk the i know that the pads are supposed to be almost touching the rotor but on mine the pad on the side facing away form the wheel (with the fluid in) is almost 2cm away from the rotor? i read something on the internet about bike hsops alligning rotors? has this got something to do with it or is there another problem (its as close to the rotor as oit will go using the alan key).

uch help appreciated. thanks
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Old 11-02-07, 06:57 PM
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I'm not entirely clear what you mean, but I gather the rotor is not centered in the caliper. You can usually loosen the caliper on the post and center it. You mean 2mm not 2cm right?? Can you post a pic?
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Old 11-02-07, 10:02 PM
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Are you talking about the rotor being out of true? There is a tool used to true a rotor, basically just bends it where needed. I've found it difficult to true them.

If its a pad adjustment look in your manual and check how pads are adjusted
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Old 11-02-07, 10:14 PM
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Three observations ...

1. If he actually has 2cm clearance, then something is radically wrong with the way the caliper is mounted.

2. The Park tools for measuring rotor true and correcting errors are excellent and I have found them very easy to use and have started saving a lot of rotors that I would have thrown away in the past.

3. The OP's communication skills make it a bit hard to actually understand exactly what his problem is. No offense intended.
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Old 11-03-07, 03:53 PM
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wrench
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Assuming you've got Hayes so1e and you mean 2mm not 2cm then try this:-
If you have a 2cm gap- visit your LBS now as something is seriously amiss with your caliper mount and you may need an adaptor plate.
-using a 5mm allen wrench, position the fixed inner pad flush with the caliper body
-position the caliper in its natural centre position over the disc
-tighten the bolts to 5Nm leaving a .38-.50mm gap between fixed inner pad and disc
-using 5mm allen wrench adjust outer pad adjuster leaving a .38-.50mm gap between pad and disc
-lever travel is governed by the gap left between disc and pad
-spin the wheel to check for drag

-if you leave more than .50mm gap between pad and disc, the lever will pull to the bar and you will get no braking effect!!
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