The 4 Wheels with Swivel Front Wheels Layout has two 5″ front swivel wheels made of rubber compound. These wheels increase ease of maneuverability and turning. They can be locked into straight tracking mode, and then unlocked for varied use.

In the rear, 4 Wheels with Swivel Front Wheels Layout has two 3″ fixed directional one-way ratchet wheels made of hard plastic. Ratchet wheels prevent backward movement and help develop a more normal rhythm, with the added safety and control.