This is the F4 99D Classic Skateboard Wheels by Spitfire.
Ride the fire with a 4-pack of classic Spitfire skateboard wheels. They're made from a high-performance urethane material, designed by pro skaters and specifically engineered in San Francisco.
| Model | Wheel diameter | Wheel width | Wheel Contact Patch |
| 55mm - Yellow | 55mm | 34.5mm | 17.5mm |