name:rubber wheel 3.50-4 model:3.50-4 wheel:pneumatic wheel load:100kgs brand name:RT rim:steel RUBBER WHEELSize 13" tall and 4" wide. 300 lb load rating at 30 psi per tire. 5/8" diameter hole. Double bearing. 5 bolt holes double rim. Tube type. 2 plyMax load of 450lbs at 30 psi pressure. Perfect for your dolly, go cart, golf cart, try cycle, and much more. we can produce many kinds of hand trolley , 1)high quality .2) competitive price 3)prompt delivery.4.popular design and OEM accept . we are a larger professional trolley manufacture . We can produce a wide range of trolley , if you have any demand , please do not hesitated to contact me . I would give the details of the model you like .