Formulated using the original Spitfire recipe, this classic formula is still very popular. It is a modern version and has been improved over time. It is trusted by Spitfire riders that have been riding them for years. Of the hard formulas if is a little more forgiving to ride on. The Classic formula is great go to wheel for any terrain and could be considered the best Spitfire all rounder. Being slightly softer it can flat spot a little easier than the newer tweaked Formula Four wheels. The nice thing with the Classics is the natural coloured wheels have a minty crisp white appearance.