• 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 1.0 mm thread pitch and 167, 160, or 154 mm length with included spacers. We partner with The Robert Axle Project to supply our thru axles.
    • Diameter of thru axle is 12 mm.
    • Thread pitch is 1.0 mm.
    • True length of axle is 167 mm, but can be shortened to 160 mm or 154 mm with the included spacers.
  • This thru axle is for attaching an Old Man Mountain rack to the rear of your bike that has a 12 mm thru axle with 1.0 mm thread pitch and 172 mm, 167 mm or 160 mm length. We partner with The Robert Axle Project to supply our thru axles.
    • Diameter of thru axle is 12 mm.
    • Thread pitch is 1.0 mm.
    • True length of axle is 172 mm, but can be shortened to 167 mm  or 160 mm with the included spacers.
  • This thru axle is for attaching an Old Man Mountain rack to the rear of your bike that has a 12 mm thru axle with 1.0 mm thread pitch and 184 mm or 175 mm length using the included spacer. We partner with The Robert Axle Project to supply our thru axles.
    • Diameter of thru axle is 12 mm.
    • Thread pitch is 1.0 mm.
    • True length of axle is 184 mm, but can be shortened to 175 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 1.0 mm thread pitch and 229 mm or 217 mm length. We partner with The Robert Axle Project to supply our thru axles.
    • Diameter of thru axle is 12 mm.
    • Thread pitch is 1.0 mm.
    • True length of axle is 229 mm, but can be shortened to 217 mm with the included tapered 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 1.5 mm thread pitch and 165 mm or 159 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 165 mm, but can be shortened to 159 mm with the included spacer.
  • This thru axle is for attaching a rack to the rear of a bike that has a 12 mm thru axle with 1.5 mm thread pitch and 178 mm or 172 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 178 mm, but can be shortened to 172 mm with the included spacer.
    • Includes hardware for attaching the rack.
  • 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 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 a bike that has a 12 mm thru axle with 1.75 mm thread pitch and 174 or 167 mm length with included spacers. 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 174 mm, but can be shortened to 167 mm with the included spacers.
  • 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 your fat bike that has a 12 mm thru axle with 1.75 mm thread pitch and 229 mm or 217 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 229 mm, but can be shortened to 217 mm with the included spacer.
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  • Old Man Mountain rack for fat bike - Fat Sherpa
    Sorry we are out of stock at this time. We're thrilled by the growth we've seen in people wanting to do more with their bikes!  We are currently focusing all production on our Classic Sherpa racks and do not have an ETA on Fat Sherpas for the immediate future. Thanks for your patience.
  • This Fit Kit contains all the parts to mount the rack to the rear of a bike with a 10 x 135 mm hub skewer: 10 x 135 mm QR Skewer, pair of 5" dropouts, pair of 14" extenders, pair of pucks, clear protective tape, and all mounting hardware.
  • 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.
  • This is the same protective tape that comes in every Fit Kit.
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