Kuat NV 2.0 Base Hitch Bike Rack - 2-Bike, 1-1/4" Receiver, BlackNV 2. 0 Base represents the same great features expected from Kuat at a lower price point: fat bike compatibility up to 4. 8", cable locks, a re designed rack pivot. The NV 2. 0 Base does not include a Trail Doc, but can be retrofitted with the Trail Doc kit. 1 1 4" models cannot be expanded to 4 bike capacity Two bike capacity, up to 60lbs each Tool free install Fits wheelbases up to 50" Includes one Phat Bike Kit to fit fat bikes with tires up to 4.