Replaces the thru-axle on a Surly bike with the MDS/Gnot Boost dropout system, so the bike can mount on a wheel-on resistance trainer. Available in 151mm or 157mm.

Compatibility & fit

Fits Surly bikes with the MDS/Gnot Boost dropout system only. Confirm your frame and the correct length with Robert Axle Project's online Axle Finder, or bring the bike to the Tune workshop and we'll check it.

Robert Axle Project's lifetime warranty covers defects in material and workmanship to the original purchaser, for the lifetime of ownership - it excludes misuse, improper installation, accidents and normal wear and tear. For warranty support, return the product to Tune Cycles and we'll manage the claim with Robert Axle Project's Australian distributor. This is in addition to your rights under the Australian Consumer Law, so keep your proof of purchase.
  • 151mm or 157mm length
  • For Surly MDS/Gnot Boost bikes
  • 7075 aluminium shaft, hard-anodised
  • 5mm hex wrench to install
BrandRobert Axle Project
Axle diameter12mm
Length151mm or 157mm
FitsSurly bikes with MDS/Gnot Boost dropouts
Material7075 aluminium, hard-anodised
Weightapprox 88g
SKU DTW-RAG-TRA218
Barcode # 602150472807
Brand Robert Axle Project