• 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 27.2 mm seat post mount provides a secure upper attachment point for Old Man Mountain racks for certain bikes.
  • This pair of 14" long extenders attaches the Old Man Mountain rack frame to the rear of your bike. The extenders have a slot for adjustability, which allows you to level the rack on different types of bikes. Includes hardware.
  • Fit Kit 814 is for mounting an Old Man Mountain Sherpa Classic on to the rear of a bike with a 12 mm thru axle.
    • Thru Axle: 12 mm thru axle with 172 or 178 mm length and x 1.5 mm thread pitch.
    • Pair of 5" Dropouts. Attach the rack frame to thru axle. Fits all wheel sizes with tire width 3 inches or under.
    • Pair of 14" extenders. Stabilize and level the rack.
    • Pair of OMM Pucks. Allows for an upper attachment point for the rack.
    • Stainless steel mounting hardware.
  • Fit Kit #813 is for mounting an Old Man Mountain Sherpa Classic on to the rear of a bike with a 12 mm thru axle.
    • Thru Axle: 12 mm thru axle with 160, 167 or 172 mm length and x 1.0 mm thread pitch.
    • Pair of 5" Dropouts. Attach the rack frame to thru axle to fit all wheel sizes with tires width 3 inches or under.
    • Pair of 14" extenders. Stabilize and level the rack.
    • Pair of OMM Pucks. Allows for an upper attachment point for the rack.
    • Stainless steel mounting hardware.

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