Increase the carrying capacity of your NV 2. 0 Rack by grabbing the NV 2. 0 Hitch Rack Add-On. Whether you're riding with friends or growing your own stable of bikes, the Add-On works with NV 2. 0 racks with the 2-inch receiver (1. 25in not compatible), and holds two extra bikes in the same way. It won't inhibit your ability to use the Trail Doc workstand, and it comes with the same adjustable cradles and included cable locks as the NV 2. 0, which have been beefed up to withstand more abuse.