Plastic is particularly adept at damping vibrations, but it loses its resilience on bumpy roads, ergo less control. A skate's chassis length is just as important as its construction. A shorter wheelbase facilitates acceleration and maneuverability. Wheels determine how the pavement feels underfoot. Harder, or denser, wheels roll faster on smooth surfaces and are highly durable.
Soft wheels offer a smoother, more comfortable ride on rough ground.
Hardness is indicated by a durometer rating. The harder the wheel, the higher the durometer number. Most skates in this review come standard with 78A-durometer wheels. A 74A is supersoft, an 82A rock-solid. Since wheels wear out, heavier skaters should go with a 78A or harder.