We developed the 120mm Disc adapter to use smaller disc’ on the Chase RSP & ACT frames with Shimano disc brakes, but on some brake/bike/hub set ups, 120mm won’t clear the frame. We have a solution !

Designed to be used with any 120mm Disc Brake Mount.
Lets you use 140mm Disc Rotors, with our 120mm Designed Disc Adapter for the Chase ACT 1.0/1.2, Chase RSP 4.0, & 2020/2021 Chase Element Complete Bikes.
Kit includes 140mm adapter, bolts, and washers.
Black with Laser etched logos.