These South Park 100A 4-pack wheels by Hydroponic are suitable for skateboards. The small 52mm wheels are the ideal street setup for pop and good balance. While the medium-sized 53mm, 54mm, 55mm, and 56mm wheels are more "all-around" and thus suitable for street, park, and small ramps. The hard and durable Hydroponic wheels with a hardness of 100A are ideal for maintaining your speed and landing steadily after tricks.