The OG Classics are Spitfire's original cut, the one the brand started with. Rounded edge and full profile, with more contact surface than the Radial, which translates into more grip and more control.
These are 56mm in 99A. It's a large size for street, and that's where they excel: they roll over gravel and rough asphalt without stopping, maintain speed over long distances, and perform well in bowls and transitions.
The urethane is Formula Four, the brand's top-tier. It doesn't flat spot on power slides, doesn't lose speed when it heats up, and lasts much longer than common urethanes.
If you skate more on the street than in a smooth skatepark, this is the combination to choose.
