Old Man Mountain

Rear Fit Kit, SET812.S 12mm,1.5x159-165mm

Old Man Mountain Rear Fit Kit (SET812.S) adapts an Old Man Mountain rear rack to frames that require a specific thru-axle size, delivering a clean, secure mounting solution without guesswork. Built around a 12mm thru-axle with 1.5 thread pitch and 159–165mm length range, this kit provides the correct axle and hardware to support consistent rack alignment and reliable cargo carrying.

• Correct-fit thru-axles (12mm, 1.5 thread pitch) - Matches the specified axle interface to keep rear rack mounting straightforward and repeatable
• 159–165mm axle length range - Covers a common rear thru-axle length window to help dial in proper rack fitment
• Included seatpost mount - Adds a stable upper attachment point for a secure rear rack setup
• Complete hardware kit - Includes the small parts needed for installation, reducing parts-chasing during setup or service
• Designed, tested, and made in Bend, Oregon - Built with consistent quality control for a critical mounting interface