The SportRack(R) Alternative Bike Adapter is perfect for allowing your bike to ride on hanging hitch or strap rack arms. It has an adjustable length, with a 31" maximum, making it easy to take your bike on the road. DESIGN: Telescoping design and protective loops Made to allow different geometry bikes (i.e., women's and bmx bikes) to ride on hanging hitch or strap rack arms Adjustable length, 31" maximum Designed for use on 1 bike