Elevn Disc Brake Post Mount Adapter Description: The Elevn Disc Brake Post Mount Adapter allows you to install mechanical or hydraulic disc brakes on a Chase frame. Install this in the 3/8" (10mm) drop out to provide a post mount for your disc brake caliper. Frame Compatibility: CHASE RSP 5.0 and 4.0 Element 2020, 2021, 2022, 2023 EDGE 2022, 2023 Features: Standard Post Mount caliper adapter for 10mm axle CNC machined 6061-T6 aluminum Optimized for 120mm diameter disc (140mm will require Mount Adaptor) Sold individually Note: Work on Center Lock hubs with Center Lock adaptor. Sold without hydraulic braking system.