Uberbike Rear Post to IS 203mm Disc Brake Mount adapter - Colour Options SKU : PM-IS-R203-BLK (0 Reviews) Review this item Uberbike CNC machined 6061 T6 alloy disc brake adapter with laser etched Uberbike logos to mount 74mm post mount caliper to 51mm international standard frame mount with 203mm disc rotor. Weight only 30g. Please select your adapter colour by using the drop down menu below - Options Silver Green Red Black Orange Blue Gold Purple IN STOCK £8.99 Earn 22 loyalty points