Wheels
Inline wheels wear out faster than the skate itself. Indoor wheels are softer and grip a sports hall floor, outdoor wheels are harder and last longer on asphalt. Revision Variant wheels and the Bauer Court and Street wheels show the difference by name.
Chassis
The chassis holds the wheels. Mission Hi-Lo chassis use smaller wheels at the front and larger at the back, which tilts the skate forward. Bauer Flexlite chassis fit Bauer inline skates.
Bearings
Bearings sit inside each wheel. Clean them after riding in the rain.
Skates are under inline skates.