Spitfire – Lock-Ins – Formula Four 99 Duro – 53 mm

Spitfire’s Formula Four is Spitfire’s latest polyurethane blend. The shape is Lock-ins and the color of the wheels is “natural” with a blue print on the front.

These wheels are 55 mm in diameter, 32.5 mm wide, have a contact surface (with the ground) of 21.5 mm and come in 99A hardness – grip & roll well.

The wheels are sold in packs of 4.