Includes a set of TGM Skateboards 52mm 99A Skateboard Wheels. 4 wheels is enough to outfit 1 skateboard. TGM Skateboard wheels are perfect for street or park skating. Our 99A SHR (Super High Rebound) formula feels more like 97A, giving it a softer and smoother ride as compared to a rock hard street wheel. These wheels measure 52mm x 32mm which is the standard size for street and park boards. They feature the classic wheel shape and come out of the package with a grooved surface. These grooves reduce friction and increase grip for a smoother ride. Skateboard wheels come in all shapes and sizes and it can be pretty easy to overthink it. There really is no right or wrong answer when it comes to skateboard wheels, it's all about personal preference. Our 52mm wheels offer an easy, standard solution (bearings not included).