Old Man Mountain Thru Axle Fit Kit

Many bike frames and forks aren't engineered to handle the stress of heavy rack loads. Mounting to the axle transfers that weight directly to the wheel assembly, which is structurally designed to bear load, protecting your frame from potential damage.

This kit is designed for 15mm thru-axle systems with a 155mm length and 1.5mm thread pitch, commonly found on Fox Boost forks. Because axle standards vary significantly between manufacturers, you must measure your existing axle's length and thread pitch to ensure compatibility before purchasing.

Yes. By utilizing the axle as the primary mounting point, the rack can support up to 70lbs (33kg). This is significantly higher than the weight capacity of standard frame-mounted eyelets.

Installation is straightforward and requires basic bike maintenance tools. The kit includes the axle, mounting pucks, protective tape, and all necessary hardware, allowing you to swap the rack between bikes or switch from front to rear mounting relatively easily.

The tape is designed to be applied to your fork legs where the rack mounting pucks make contact. It prevents the metal hardware from scratching or wearing down your fork's paint finish over time.