Supercross | Sidemount 120mm Disc Brake Adapter / Post Mount
$ 21.95
If you are wanting to run a 120mm Rotor on any of the new 2026 RS7 Frames, the OS20 SX450 Frames or our other frames that have slottet sidemount Disc Brake Adapters, this is the mount for you.
Machined from 7075 T-6 Alloy, it allows you to mount a Post Mount Disc Brake to any Sidemount Frame Bracket.
Race calendar
Never miss a USABMX national
Add the 2026 USABMX national race schedule to your calendar with one click. Built by Supercross BMX so racers, parents, and fans can keep every national weekend in one place.
Dates are based on the official USABMX national schedule and may be updated if changes are announced. This calendar is a fan/racer convenience tool from Supercross BMX and is not an official USABMX calendar.