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Adapter for 160mm rear brake caliper?

Old 07-28-22, 01:50 PM
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Polaris OBark
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Adapter for 160mm rear brake caliper?

I have a frame with a direct mount for a flat-mount rear caliper positioned where it is compatible with a 140mm disc rotor, as pictured below. Is it possible to get an adaptor to position at the tip of the yellow arrow that would enable use of a 160mm rotor? My front (Shimano GRX) caliper comes with a mount for using a 160mm rotor with my fork. Would the same mount work, or does it differ for the rear caliper (which does not come with an adaptor).


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Old 07-28-22, 02:41 PM
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Found out what I need:Shimano SM-MA-R160D/D Disc Brake Adaptor
192790168562

Now if I can buy it anywhere but Amazon ...
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Old 07-28-22, 04:09 PM
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Crankycrank
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Originally Posted by Polaris OBark View Post
Found out what I need:Shimano SM-MA-R160D/D Disc Brake Adaptor
192790168562

Now if I can buy it anywhere but Amazon ...
Ebay, and reliable seller. Shimano R160D/D Disc Brake Adaptor Flat Mount 160mm 689228561601 | eBay
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Old 07-28-22, 04:39 PM
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sean.hwy
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Originally Posted by Polaris OBark View Post
I have a frame with a direct mount for a flat-mount rear caliper positioned where it is compatible with a 140mm disc rotor, as pictured below. Is it possible to get an adaptor to position at the tip of the yellow arrow that would enable use of a 160mm rotor? My front (Shimano GRX) caliper comes with a mount for using a 160mm rotor with my fork. Would the same mount work, or does it differ for the rear caliper (which does not come with an adaptor).


Do you have enough room? that looks pretty tight.
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Old 07-28-22, 04:48 PM
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The adapter moves the caliper out (to the left) so there should be space.

Also, the frame manufacturer says it will work.

Last edited by Polaris OBark; 07-28-22 at 04:52 PM.
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