Abec 11 Longboard Wheels At 76mm, the Gumball will roll over stuff well and can even keep up with bigger wheels to a certain point. They accelerate quickly, carry a very high top end, and corner like nothing else They provide quick, fast, smooth, high traction control with lots of lively urethane on them so they absorb much of the shock in bumpy roads. 75a - Perfect for gravity racing on mountain roads with speeds 55mph or less. 78a - Gravity racing smoother roads. 81a - Rough slalom courses and ditches. 84a - Most slalom courses and ditches. 88a - Smooth slalom courses and ditches. Available in Sizes: 76mm x 75A 76mm x 78A 76mm x 81A Price is for a set of 4 Wheels