and the original waffle outsoles are made of a rubber that offer grip and support

5-base cylindrical lens

75% Organic Cotton / 22% Polyester / 3% Elastane

The Ace 1/8" Shims (aka riser pads)

and the low sidewalls allow for freedom of movement while riding

Spitfire F4 Classic 99D Wheels 54mm E M9.5-11 W10.5-12 and the original waffle outsolesThe Spitfire Formula 4 Classics come in at a 54mm diameter and 99a durometer making it a pro wheel stable for skating street, skate parks and bowls! The Spitfire Formula 4 Classics are built to excel with its signature Formula 4 design. Formula Four Urethane was developed to combine all the desired properties of a performance wheel without sacrificing any one attribute at the expense of another! Features: Diameter: 54mm Durometer: 99a