Lip/Edge StyleLip/Edge Style: Sharp lips offer maximum traction and are ideal for carving, pumping, downhill, and slalom riding. Rounded lips slide more smoothly and are ideal for freeride and freestyle. Rounded lips also help wheels pass more smoothly across pavement cracks when commuting.
DurometerDurometer: Measure of wheel hardness. Softer wheels (77a-80a and lower) offer more traction and roll smoother and faster over rough surfaces. Harder wheels (83a-86a and higher) slide more easily, offer greater durability, and roll faster over smooth surfaces.