Spitfire Formula Four Skateboard Wheels Conical Full 101DU Natural 54mm truck-size-5-25-139-147 4140 chromoly steel axles and

4140 chromoly steel axles and grade 8 kingpins

Spitfire Formula Four Skateboard Wheels Radial 99DU Natural 54mm

101duro hardness makes these grippy without the loss of speed

High speed nylon ball retainer provides added strength and speed

strengthened grade 8 kingpin

Spitfire Formula Four Skateboard Wheels Conical Full 101DU Natural 54mm truck-size-5-25-139-147 4140 chromoly steel axles andSpitfire Formula Four Skateboard Wheels Conical Full 101DU Natural 54mm Features : 54mm diameter, 34mm overall width with a 22mm riding surface. Ultilizing a wider riding surface and cutaway design for unmatched control and lasting speed on all surfaces. 101duro hardness makes these grippy without the loss of speed. Spitfire's unmatched true performance flatspot resistance wheels.