Thule Helium 2 Bike Hitch Rack: Some hitch racks are so heavy that mounting them requires an abnormal amount of sweating and cursing. Not so with the Thule Helium 2 Bike Rack—Thule made this rack with a lightweight, easy-to-handle aluminum construction. Plus the narrow distance between the cradle arms works well for women’s and kids’ bikes (no adaptors necessary). An integrated cable locks your bikes while a locking knob secures the rack to the receiver. Fold the arms down when you’re not using the rack.