Designed to simplify thousands of hangers into one universal design that can be easily stocked by your local bike shop. Burgtec's UDH hanger is uniquely forged and fully machined from aluminium giving you the toughest hanger possible. Note: The washer included with this version is specific to Treks with ABP and a UDH hanger. Compatible with all MTB and E-MTB drivetrains Forged and Fully Machined from 7075 Aluminium Supplied with Mounting Screw and Washer Thru Axle Pitch M12 x 1.0 Manufacture’s part number: AC-DRHG-MTB-A1 If you don't have a Trek with ABP then the non-Trek specific UDH hanger is available here