The Blackburn Pivot Pro Hitch Bike Rack Add-On is an additional accessory for the Pivot Pro Hitch Rack. This piece won't work without the original rack, so be sure you have one of those, and then you'll be able to haul two bikes instead of just one. Whether you're bringing along a family member, friend, or your other favorite bike, two is always better. This sturdy add-on will hold a bike up to 150 lbs and fits 16 to 29 inch wheels.