Conceived for road trips, family group rides and expeditions in the backcountry, we took the best platform rack on the market and increased it. Expand your vehicle&&';;s carry capacity (and your circle of friends) up to four bikes with the NV 2.0 Add-Ons. FEATURES 1-Bike Add-On: Quick change from 2 to 3 bikes 2-Bike Add-On: Quick change from 2 to 4 bikes Compatible with 2" NV 2.0/Base 2.0 WEIGHT a 1-Bike Add-On: 28 lbs. a 2-Bike Add-On: 51 lbs. CARRYING CAPACITY 1-Bike Add-On: Increases 2" NV 2.0/Base 2.0 carrying capacity to 3 bicycles weighing up to 50 lbs. each 2-Bike Add-On: Increases 2" NV 2.0/Base 2.0 carrying capacity to 4 bicycles weighing up to 40 lbs. each Holds wheelbases up to 50" and tires as large as 5"