This adapter's telescoping design and protective loop allows different geometry bikes (i.e. women's and bmx bikes) to ride on hitch or strap rack arms.This product will be shipped directly from SportRack and will leave their warehouse in 2-3 business days. Eligible for UPS ground shipping only. . Adjust length (31 in. maximum). For use on 1 bike. 770527906511 19592500012 SR0500