When you're packing bags and planning logistics for a four-person, cross-country trip to a storied desert trail system, there's a whole lot of snack money to be saved by expanding your rack's carrying capacity with Kuat's NV Base 2. 0 2 Bike Add On to accommodate everyone instead of shelling out gas for a whole extra car to tote those two extra bikes. Expanding your 2-bike NV Base 2. 0 into a 4-bike capacity, this add-on features adjustable cradles that accommodate wheelbases up to 48in and tire sizes ranging from skinny road slicks up to 4. 8in fat tires. It also includes integrated cable locks for peace of mind at travel day cafe stops.