Avid Post Mount Brake Adapter $20.00
Avid's 10, 20, 30, and 40mm Brake Adapters fit a variety of Post Mount applications including both 160mm front and 140mm rear. To find the correct components, pick a rotor size and fork/frame interface then reference either Sram's caliper mounting and spacer configurations doc or the tech specs to the side.
What community has to say
My 2012 Specialized Stumpjumper HT is 140mm...
My 2012 Specialized Stumpjumper HT is 140mm post-mount rear with the 20mm spacers on it to work with the 160mm rotor/Avid Elixir 7s that came stock on the bike. I'm swapping the brakes out for Shimano XTs with 160mm rotors. Can I just continue to use the Avid spacers that are already on the post mounts? Do I need to get the Shimano-specific post-mount adapter?