Spitfire - F4 93 Duro Classics 58mm - Skateboard Wheels generator 5mm Allen key or standard

5mm Allen key or standard 9/16" hex wrench

pro-skaters have noticed less pain on their muscle

Kader Sylla

All those facts are not only provided by top rider

It actually increases the resistance to turning because it is held in place by the HardCore insert

Spitfire - F4 93 Duro Classics 58mm - Skateboard Wheels generator 5mm Allen key or standardThe most controllable and consistent sliding soft wheel out. Soft Duro combined w High Rebound compound absorbs more impact & vibrations easier on your body for longer sessions. Holds speed through even the roughest terrain. Reliable grip when you need it. Unmatched Formula Four flatspot resistance.