• This thru axle is for attaching an Old Man Mountain rack to the rear of a bike that has a 12 mm thru axle with 1.75 mm thread pitch and 180 mm or 174 mm length. We partner with The Robert Axle Project to supply our thru axles.
    • Diameter of thru axle is 12 mm.
    • Thread pitch is 1.75 mm.
    • True length of axle is 180 mm, but can be shortened to 174 mm with the included spacer.
  • This thru axle is for attaching an Old Man Mountain rack to the rear of a bike that has a 12 mm thru axle with 1.75 mm thread pitch and 198 mm or 192 mm length. We partner with The Robert Axle Project to supply our thru axles.
    • Diameter of thru axle is 12 mm.
    • Thread pitch is 1.75 mm.
    • True length of axle is 198 mm, but can be shortened to 192 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 1.75 mm thread pitch and 209 mm. We partner with The Robert Axle Project to supply our thru axles.
    • Diameter of thru axle is 12 mm.
    • Thread pitch is 1.75 mm.
    • True length of axle is 209 mm.
  • 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.
    • 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 your fat bike that has a 12 mm thru axle with 1.5 mm thread pitch and 209 mm length. We partner with The Robert Axle Project to supply our thru axles.
    • Diameter of thru axle is 12 mm.
    • Thread pitch is 1.5 mm.
    • True length of axle is 209 mm.
  • This thru axle is for attaching an Old Man Mountain rack to the front of your road or gravel bike that has a 12 mm thru axle with 1.75 mm thread pitch and 122 mm length. We partner with The Robert Axle Project to supply our axles.
    • Diameter of thru axle is 12 mm.
    • Thread pitch is 1.75 mm.
    • Length is 122 mm.

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