Spitfire F4 Conical Full 54mm 99D Skateboard Wheels

Spitfire Formula Four Performance Urethane

Tested rigorously in Spitfire labs and, most importantly, on the streets by Spitfire Team riders, Formula Four Performance Urethane has proven to last longer, endure more abuse, and outperform all other wheels. Spitfire developed Formula Four Urethane to deliver all the essential qualities of a performance wheel without compromising any single attribute. The true lasting performance of Formula Four comes from a carefully balanced combination of features, resulting in a wheel that excels in every aspect.

Wheel Shape / Profile: Conical Full

The Conical Full shape features a cone-like design achieved through flatter surfaces extending from the contact patch to the side of the wheel. Originally popular in the late 1970s, double conical wheels referred to this shape being applied to the corners or both sides of the wheel. This design has been refined in recent years to suit smaller, harder wheels. The Conical Full shape offers a well-defined corner for slides, flatter sides for locking into edges, and a wider contact patch. It's typically 2 to 3mm wider than the standard conical shape, providing increased grip and slide control without sacrificing too much speed.