The Reynolds Formula Four Pro skateboard wheels feature Spitfire's Formula Four urethane that makes flat spots basically a non-issue. Add in the fact that these have an anti-slick top riding surface for added traction and you've got yourself a nice set of wheels.
Narrow - Narrow wheels have the least amount of traction and are intended for advanced, tech riding.
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.
Classic Shape - The original Spitfire wheel designed and shaped by the pros who ride them.
99a - Best used in pools and parks with a little more grip than harder wheels, and a little more slide than softer wheels. Ideal for moderately skilled riders who also want to skate street when needed. Hard enough that sliding is a breeze while soft enough for a smooth roll and plenty of grip.
Most urethane skate wheels generally range from 75a-101a, the numbers increase with the hardness of the wheel.
|Riding Surface (mm):||13.8||14.0|
|Suggested Riser Size (in):||N/A||N/A|