The Spitfire Formula Four 99 Conical Full Wheels are a wider, more stable take on Spitfire's Conical shape. They're natural white wheels with the classic blue print, poured in Formula Four 99 duro urethane. The wide riding surface gives you grip and stability, and the cut-in sidewalls shave off weight, so they're a solid, controllable wheel for everything from street to bowls.
Specifications
| Brand | Spitfire Wheels |
| Formula | Formula Four (F4) |
| Durometer | 99D |
| Shape | Conical Full |
| Color | Natural with blue print |
| Sizes | 52mm, 53mm, 54mm, 56mm, 58mm |
| Quantity | Set of 4 wheels |
More Info
Why We Like Them
- Formula Four urethane: Spitfire's best stuff. Super fast, resists flat spots, and lasts way longer than cheap wheels.
- 99 duro: Hard and fast, with smooth, controllable slides that don't get sticky.
- Conical Full shape: A wider version of the Conical, with more riding surface for grip and stability.
- Cut-in sidewalls: Less weight, so your setup stays light and responsive.
- For all terrain: Stable enough for transition, controllable enough for street.
- Five sizes: 52mm, 53mm, 54mm, 56mm, or 58mm.
Which Size Should I Get?
| Size | Best For |
|---|---|
| 52mm | Technical street, ledges, and flip tricks. Light and low. |
| 53mm | Street with a little more roll. A great all-arounder. |
| 54mm | Street and park. The most versatile size. |
| 56mm | Park, bowls, and transition. Holds more speed. |
| 58mm | Bowls, pools, and big transition. Maximum speed and roll. |
Frequently Asked Questions
What's the Conical Full shape?
It's a wider version of Spitfire's Conical shape, with a wide riding surface for grip and stability and cut-in sidewalls to keep the weight down.
What does F4 99 mean?
F4 is Spitfire's Formula Four urethane, their top-of-the-line formula. 99 is the durometer, or hardness, which makes them hard, fast, and slidey on smooth surfaces.
Are 99 duro wheels good on rough ground?
They're best on smooth concrete and at the park. On really rough streets they'll feel bumpier. For crusty spots, check out softer options like Spitfire's 93 or 97 duro wheels.
How many wheels come in a set?
Four wheels, enough for one board. Bearings are sold separately.