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Old 04-05-12, 09:43 PM   #1
rdtompki
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Shimano XT ICE rotor

I'm going to be installing a new rotor on the rear of our tandem, replacing the current Avid 203mm. It's probably time after 8000 miles. I just wanted to post a note about the torque required: I believe the Avid rotors are 7-9 Nm. The Shimano rotor is 2-4 Nm. I'm guessing this is due to the much greater coefficient of expansion of Al versus steel? Wouldn't mind hearing from anyone who has installed these rotors.
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Old 04-05-12, 10:22 PM   #2
mechBgon
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Shimano has the retaining ...thingies, I don't know what to call them, between the bolt head and the rotor too. They resist loosening by virtue of those (you're supposed to fold their ears up against the bolt heads), not simply bolt torque. Shimano's all-steel rotors use the same torque spec.

For the record, Avid's spec is 55 inch-pounds or 6.2 N.m.
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Old 04-05-12, 10:50 PM   #3
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Quote:
Originally Posted by mechBgon View Post
Shimano has the retaining ...thingies, I don't know what to call them, between the bolt head and the rotor too. They resist loosening by virtue of those (you're supposed to fold their ears up against the bolt heads), not simply bolt torque. Shimano's all-steel rotors use the same torque spec.

For the record, Avid's spec is 55 inch-pounds or 6.2 N.m.
I haven't looked at the rotor closely, but it didn't come with its own bolts and the folding tabs over the round heads of the current torx screws may not do much good. I'll have to investigate further.

UPDATE: upon closer inspection the rotor does come with six square-headed torx screws. All makes sense now. These rotors do work with a BB7 caliper, but you need to cut off the tab on the inner brake pad. Good reports from the tandem community so far.

Last edited by rdtompki; 04-06-12 at 09:14 AM. Reason: correction
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