- Diameter of thru axle is 12 mm.
- Thread pitch is 1.5 mm.
- True length of axle is 229 mm, but can be shortened to 223 mm with the included spacer.
This thru axle is for attaching an Old Man Mountain rack to the rear of a fat bike that has a 12 mm thru axle with 1.5 mm thread pitch and 229 mm or 223 mm length. We partner with The Robert Axle Project to supply our thru axles.