180mm Rear Disc Rotor Adapter for flat mount road/gravel frames

180mm on flat mount? ✅

If you’re a weirdo and want 180mm on your flat mount bike, can’t think of a better adapter because I don’t know of any others! Details: Beaux Jaxon 58mm frame, Red SRAM brakes (2024) w/ centerline rotors. No fit issues in the slightest, works great.

Works just as it should

I was hunting for the Shimano flat mount standard drawings so I could draw these up myself when I found Peak Torque's version. Have used these to mount Shimano Ultegra R8150 brakes front and rear on a road bike with 140/160 mounts. No issues at all. Fasteners are correctly sized. Surface finish of the parts is good, and they're nicely finished with no sharp edges. Hoping this keeps brake fade at bay for my 100kg frame. Plan to use these on a gravel bike running Hope RX4+ +20mm calipers front and rear on a 140/160 frame & fork. Haven't made the mod, but looks like they'll work although I might have to use different fasteners.

Works well!

Gen 2 Checkpoint with Hope RX4+ calipers. Front adapter fit perfectly. Rear adapter needed to be shimmed a mm or so to avoid rubbing caliper body. As I am not running Shimano brakes I did expect to run into some issues.