Sparehand/Glacik Freestanding 3 tier kayak and SUP Hybrid Storage Rack has a 210-pound maximum weight capacity and is a convenient storage solution. The heavy-duty rack fit kayaks and canoes with a length up to 18-feet and a hull size up to 36-inches wide and 18-inches deep. The rack can also be used to safely transport your canoes and kayaks to and from your car with the addition of the G-C4 Caster Wheels (sold separately). With 2 option for center cradle arms if installed in its higher mounting location, you will have 30″ between bottom to the center cradles and 26.5″ between center cradles to top cradles. When you install center cradle arms in its lower mounting location, the space between base and center cradle arm is 26″ and between center cradle arm and upper cradle arm is 30.5″