Now you can easily transport your fatbike with the Thule(R) ProRide Fatbike Adapter. These wheel holders fit the Thule(R) ProRide Roof Rack. Just replace the set of wheel holders with the adapter holders and you are set! FEATURES: Adapter for the Thule(R) ProRide Roof Rack Allows you to carry fatbikes Features a set of replacement wheel holders Fits wheel dimensions 3-5" Manufacturer's Limited Lifetime Warranty