ALL-TERRAIN--Sturdy steel frame supports heavy kayaks. Large 16" butyl rubber tire, maximum inflation pressure 40 PSI , 2 long Cam Buckle straps prevent shifting. Suitable for all terrain. VARIETY OF HULLS--BUNKER BARS are adjustable to fit numerous hull types including tunnel/catamaran, V-shaped, and flat bottom.Width Adjustment 5.5"-29.5". 300 LBS CAPACITY KAYAK DOLLY--This kayak cart is fully adjustable while remaining sturdy, easy to use, and holds up to 330 lbs. LARGE 16” BUTYL RUBBER TIRE--The 16" big wheels make this kayak wheels cart better and easier on the sand, letting you roll your kayak smoothly across streamlined movement over a variety of terrains like sand, lawns, and rough terrain. EASY TO INSTALL-- Easily assemble the kayak cart in minutes with only a screwdriver. Hardware included. Morohope Kayak Beach Cart, Width Adjustable 5.5"-29.5" Universal Canoe Dolly Heavy Duty Kayak Trolley with 16" Wheels, Sturdy 300 LBS Weight Capacity