T-Funks newest pro formula four wheel, the Savie Radial Full. Don’t pass on this one. 60mm 97A Formula 4, Radial Full shape. Spitfire Formula 4 features more speed and control on all surfaces, unmatched flatspot resistance, smooth anti-stick slide, high rebound compound. 100% true performance urethane. The Radial Full offers a super wide riding surface with round edges for stability and versatility. 60mm x 41.5mm, 97A. T-Funks newest pro formula four wheel, the Savie Radial Full.