Shimano Flat Mount Disc Brake Adapter

Yes. Flat mount adapters are rotor-size specific because they position the caliper at a precise distance from the axle to match the diameter of the rotor. You must choose the adapter that corresponds to the rotor size you intend to run, such as 140mm or 160mm.

These adapters are specifically engineered for Shimano flat mount calipers. While some other brands may share similar mounting standards, we recommend using this adapter only with Shimano systems to ensure proper alignment and safety.

Most modern road and gravel frames are designed with flat mount standards, but whether you need an adapter depends on your frame's native mounting size and your desired rotor diameter. Check your frame's technical manual to see if it is natively 140mm or 160mm, as that will dictate if you need an adapter to step up to a larger rotor.

Yes, each adapter comes with the necessary hardware to securely attach the caliper to the adapter and the adapter to your frame or fork. Always ensure these bolts are torqued to the manufacturer's specifications during installation.

Not necessarily. Front and rear flat mount standards often differ in their mounting geometry. Be sure to select the specific adapter designated for either the front or rear application to ensure the caliper sits correctly over the rotor.