The Spitfire Formula Four 99 Radial Wheels are a do-it-all wheel for skaters who want speed, smooth slides, and a set that lasts. They're poured in Spitfire's Formula Four 99 duro urethane in natural white, with the Radial shape's rounded edges for a smooth, predictable feel. Fast, durable, and easy to control, these are always a solid pick.
Specifications
| Brand | Spitfire Wheels |
| Formula | Formula Four (F4) |
| Durometer | 99D |
| Shape | Radial |
| Color | Natural |
| Sizes | 52mm, 53mm, 54mm, 56mm |
| 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 at the park and on smooth street spots.
- Radial shape: Rounded edges give you smooth, predictable slides and easy locking into grinds.
- Abrasion resistant: Holds its shape and keeps rolling session after session.
- Four sizes: 52mm, 53mm, 54mm, or 56mm, so you can dial in your setup.
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. |
Frequently Asked Questions
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.
What's the Radial shape?
It's a Spitfire shape with rounded edges, which gives you smooth, predictable slides and makes it easy to lock into grinds.
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.