The Rocky Mounts BrassKnuckles helps you get the leverage you need when securing your bike high up on your vehicle with it's cleverly designed handle! Product Features: No front wheel removal No contact with frame, secures bicycle by front wheel Form-fitting stainless steel mounting straps that fits all square, round, factory & aero crossbars Ergonomic brass knuckles shaped handle Product Specifications: Carries 1 bike, up to 45 lbs on RockyMounts®, Thule®, or Yakima® bars, 35 lbs on factory crossbars Carries road tires up to 3.0” wide mountain bike tires, and diameters from 20” to 29”. Can fit up to 5” with additional fattie kit (#12400) Compatible with bicycles’ wheelbases from 34” and 48” Crossbar Spread: Minimum 24" (61cm) Maximum 43" (110cm) Not for use with bicycles with front fenders Black Only (Red, Silver, White no longer available) Lock cores sold separately