Old Man Mountain

Rear Fit Kit, SET813.S 12mm,1.0x160-172mm

Old Man Mountain Rear Fit Kit, SET813.S is a complete rear mounting hardware solution for riders using an Old Man Mountain cargo rack on frames that require a thru-axle interface. Built around a 12mm axle with 1.0 thread pitch and a 160–172mm length range, this kit supplies the correct axle, seatpost mount, and hardware needed to create a stable, rack-ready rear setup for commuting, bikepacking, and everyday load carrying.

• Complete rear fit kit - Includes thru-axle(s), seatpost mount, and mounting hardware to simplify rack installation and service
• 12mm x 1.0 thru-axle spec - Targets frames using a 12mm rear thru-axle with 1.0 thread pitch for proper fit and secure clamping
• Axle length coverage - Sized for 160–172mm rear axle applications to help match common modern frame standards without guesswork
• Seatpost-based upper mount - Provides a practical attachment point when seatstay eyelets are limited or unavailable, supporting a solid rear rack interface
• Designed, tested, and made in Bend, Oregon - Developed with real-world cargo and bikepacking use in mind