Old Man Mountain

Rear Fit Kit, SET817.S 12mm,1.0x154-167mm

Old Man Mountain Rear Fit Kit SET817.S is a complete rear mounting solution for riders running a 12mm thru-axle setup who want a secure, properly sized interface for an Old Man Mountain rack. By pairing the correct-length thru-axle with the included seatpost mount and hardware, this kit simplifies installation and helps deliver a stable platform for commuting loads, bikepacking bags, or daily cargo—especially on frames that don’t make rack fit straightforward.

• Complete rear fit kit - Includes thru-axle(s), seatpost mount, and hardware for a streamlined rack-mount setup
• 12mm x 1.0 thread specification - Built around a common modern thru-axle standard for compatibility-focused replacement and rack integration
• Axle length coverage: 154–167mm - Helps match the correct axle length range across different rear frame/dropout designs
• Seatpost-mounted support - Adds a dependable upper mount location when traditional rack eyelets are limited or absent
• Designed, tested, and made in Bend, Oregon - US-made fit hardware from Old Man Mountain for riders who prioritize proven rack-mounting components