Spitfire Formula Four Lock-In Full Skateboard Wheels are 99d wheels featuring a smooth riding surface in a wide profile and constructed with Formula Four Urethane in the Lock-In Full Shape. Sizes available (mm): 54, 55, 57. Sold as a set of 4.
Surface
Smooth
Quantity
Set of 4 Wheels
Wheel Profile
Wide
Key Features
Formula Four Urethane
Wheel Shape
Lock In Full Shape
Durometer
99a
Features
Surface
Smooth - Smooth wheels come with a shiny coating on the riding surface that feels grippy at first, but wears away quickly.
Wheel Profile
Wide - More traction and stability at high speed so you'll be less likely to slip out of your line.
Key Features
Formula Four Urethane - Unmatched abrasion resistance for fewer flat spots. More controllable grip. Lasting speed no matter the terrain. Smooth anti-slick slide and a longer lasting size and shape.
Wheel Shape
Lock In Full Shape - A wider version of the Lock-In shape. Keeping the asymmetrical shape and design while featuring a conically cut outer wall and a straight edge "lock-in" cut on the inside wall.
Durometer
99a - Offers more grip than harder wheels and more slide than softer wheels. Great for slick surfaces when you want more control.
