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shimano xt disc distance


signo97
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Same here, disc mount on the Hex (our model at least) seems to be +23 mm, not +20. So using an IS->PM +20mm adapter and a 180 rotor will have a bit too much space above the disc. Ideally you'd run a 183 mm disc, or file 1.5 mm off the adapter. Tried the latter, but couldn't get it perfectly straight without access to a proper machine shop, so I just live with it. Just make sure to sand down the little ledge that will form at the top part of your pads once in awhile.

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42 minutes ago, signo97 said:

sand some mm from the adapter is dangerous? 

No, but you have to get both faces where the caliper mounts onto perfectly straight and perpendicular to the mount, otherwise your caliper will sit at a slight angle, which is bad for performance.

Edited by Daan
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Check again, this issue is there with every brake. Tiny bit of pad doesn't touch the disc. Anyway, don't sweat it, it's normal on this bike.

Edit: I asked Adam from Tarty a few years ago about this as well. To ease your mind, this is what he said:

"Inspired have gone to the top of the tolerance on these specs to avoid issues with people going 'the other way' (trying to use a 203 rotor when it should be 200) and ensure full compatibility between brake systems (it will still work if an IS style caliper is a bit high but you're stuffed if it's too low!). 

Removing some material from the adaptors will work (happy to help with that if you like - we have a milling machine here), alternatively using smaller adaptors (for, say, 160 or 165) then a few washers between the adaptor and caliper will do the trick too, and allow you to fine-tune the rotor vs caliper position."

Edited by Daan
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