NV 2.0 Base Add-On Rack Tray Two-bike capacity, up to 60lbs each Fits wheelbases up to 50 Includes one Phat Bike Kit to fit fat bikes with tires up to 4.8". Additional kits available separately Fully integrated cable locks This is an expansion rack only and requires a 2" Receiver NV 2.0 or NV Base, not compatible with 1-1/4" NV Base or NV 2.0