Spitfire – OG Classics Formula Four 99 Duro – Natural – 55 mm

Spitfire’s Formula Four is Spitfire’s latest polyurethane blend. The shape is OG Classics and the color of the wheels is “natural” with yellow / black print on the front.

OG Classics is Spitfire’s “original cut away shape”. These are wide wheels with concave centers.

These wheels are 55 mm in diameter, 33 mm wide, have a contact surface (with the ground) of 22.5 mm and come in hardness 99A – grips & rolls well.

The wheels are sold in packs of 4.