NV 2.0 Base +1-Bike Add-on Rack expands the capacity of the NV 2.0 Base to carry 3 bikes. Need a bit more carrying capacity with the NV 2.0 Base? Look no further than the NV 2.0 Base +1 Bike Add-on Rack. Featuring the same refined ratchet arms and adjustable cradles as the base NV, it’s up to the job when just a bit more room is needed.