The Formula Four Conical Full skateboard wheels feature Spitfire's performance urethane that lasts longer and withstands more abuse than the competition. Pick which duro you're looking for after assessing the varying attributes, 'cause this is getting technical.
Standard - Your classic wheel shape, it's not built to excel in specific scenarios like a narrow or wide wheel, but it's appropriate for most situations. If you're new to skating this is where you want to start.
Smooth - Smooth wheels have less surface friction than treaded wheels and are easier to slide.
Formula Four Urethane - Unmatched abrasion resistance for fewer flat spots. More controllable grip. Lasting speed no matter the terrain. Smooth anti-slick slide and a longer lasting size and shape.
Conical Full Shape - Wider riding surface and cutaway design for unmatched control and lasting speed.
|check natural (99d)||99a|
|Riding Surface (mm):||21.0||21.5||22.0||25.0||27.3|
|Suggested Riser Size (in):||N/A||N/A||N/A||1/8||1/8 - 1/4|