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I'm new to these fangled disc brake things, trying to work out what adaptors I need. Will be using SLX or XT brakes, are the caliper mounting holes direct post mount, or is some sort of adaptor always required?
At the front I have a Rockshox recon race fork (post mount). If the caliper goes straight on, does that line up for 160mm rotor? If I wanted to use 180mm rotor, I need a 180mm post to post adaptor? According to Ribble's website, that has been discontinued though?
To further complicate matters, I also have a Pipedream Infinity rigid fork to swap around at the front. That looks to have IS mounts. So presumably I'd need a 180mm to IS adaptor for that?
The rear has IS mount points (Cotic Soul), and I was planning to run 160mm rotor there. Do I just need a 160mm post to IS adaptor?
Finally, what about bolts, do the calipers and/or adaptors come with them, or do I need to buy them separate?
Shimano calipers are post mount and 160mm so you're good to bolt them straight on for 160mm discs.
For 180mm front you need a 180 post to post
http://www.ebay.co.uk/itm/Shimano-Bicycle-Bike-Disc-Brake-Post-Mount-to-Post-Mount-Front-Adapter-180mm-/290941890609?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item43bd7cf031
For the IS you need;
http://www.ebay.co.uk/itm/Shimano-FRONT-IS-to-POST-Mount-Bike-Disc-Brake-Bracket-Adaptor-for-180mm-/300895948288?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item460ecbce00
The calipers should come with post bolts. The mounts should come with a set of post bolts as well IIRC.
tim