Rear Disc Brake Adapter for Gary Fisher Trek Klein Frames 160mm Post Mount Disk Rear disc brake adapter for Trek / Klein / Gary Fisher frames Machined Aluminum (6061-T6) - Designed and Modeled in the USA! Designed for frames model years 2002 and newer Direct mount for 160 or 165mm rotors For additional applications (140mm, 180mm, etc), please see our "universal" version