I am selling this item because I tried it on once in the past but have had no opportunity to use it since. I purchased it new about two years ago. The tires also show no wear. Product Description The SmallRig Universal Tripod Dolly 3986 is a universal accessory specifically designed to move tripods and facilitate action shooting. The large, adaptable wheels handle complex terrains, and it features locking parts to prevent slippage due to uneven ground or collisions. With extendable legs that stretch from 298 mm to 435 mm, it is compatible with various tripods at any opening angle. This foldable and easy-to-store tripod dolly also comes with a handle and carrying bag for easy transport. 1. Quickly move the tripod and facilitate action video shooting. 2. Large wheels provide high terrain adaptability and secure locking. 3. Extendable legs are suitable for various tripods. 4. Foldable structure and carrying handle for convenient portability. 5. Carrying bag for easy transport and storage.