The Orangatang Stimulus is a versatile free ride wheel that is all about hard carving and steady sliding. Features double rounded lips and a pre-broken, stone-ground surface so it's instantly ready for smooth slides. Designed with wide contact patches for more grip. The Stimulus is 70mm tall with a contact patch (width of wheel in contact with ground) of 42mm for rapid acceleration and plenty of control for all your moves. The 83a purple offers up a ride that's optimized for sliding and grip.