Spitfire Skateboard Wheels F4 99A Lock-In Full 57mm Formula Four
by
Spitfire
SKU: SP959
Description
Spitfire Formula Four 99A Lock-In Full Wheels 57mm pair Formula Four 99A urethane with the Lock-In Full shape. Formula Four 99A is made for speed and lasting control on all surfaces, and it's one of Spitfire's most ridden duros worldwide.
At 57mm x 40.2mm, with a 27.5mm riding surface, bigger wheels like this roll faster and smoother for bowls, transition, and rough ground. Sold as a set of 4.
Who These Wheels Are For
- Skaters who want stable lock-ins on all terrain
- Bowl, pool, and transition skaters
- Skaters who want Spitfire's most ridden duro
- Spitfire fans
Features
- Formula Four 99A urethane
- Formula Four urethane: unmatched flatspot resistance and smooth anti-stick slide, per Spitfire
- Lock-In Full shape
- 57mm diameter, 40.2mm wide, 27.5mm riding surface
- Set of 4
Benefits
- Speed and lasting control on all surfaces
- Stable lock-ins on all terrain
- Bigger wheels like this roll faster and smoother for bowls, transition, and rough ground
Specs
| Brand | Spitfire |
| Formula | Formula Four |
| Durometer | 99A |
| Shape | Lock-In Full |
| Diameter | 57mm |
| Width | 40.2mm |
| Riding Surface | 27.5mm |
| Includes | Set of 4 wheels |
Compare Formula Four 99A Lock-In Full Sizes
Every size in this line uses the same formula and shape.
| Size | Width | Riding Surface |
|---|---|---|
| 54mm | 38mm | 25mm |
| 55mm | 39.5mm | 26.8mm |
| 57mm (this page) | 40.2mm | 27.5mm |
Complete Your Setup
New wheels deserve fresh bearings. Spitfire makes three tiers:
- Spitfire Cheapshots Bearings (Good): Spitfire's base-level bearing, tested by the pro team, with removable black shields to keep the crud out.
- Spitfire Classics Bearings (Better): Superfast and durable, with heat-resistant chromium steel rings, removable nylon cages, and blue removable shields.
- Spitfire Burners Bearings (Best): Spitfire's high-performance pick, with polished honed races and high carbon chromium steel, packed in a reusable tin.
FAQ
Is 99A hard or soft?
Hard. 99A is the standard street and park hardness: fast, with a controllable slide.
What is the Lock-In Full shape good for?
Stable lock-ins on all terrain. Spitfire describes it as a wider version of the Lock-In shape: asymmetrical, with a concave cut outside for less weight and a straight-edge lock-in inside for control on all terrain.
What size wheels should I get?
Smaller wheels (50 to 52mm) are light and technical, 53 to 54mm is the street and park go-to, and 55mm and up adds speed for transition and rough ground. See our skateboard wheels guide for more.
Description
Spitfire Formula Four 99A Lock-In Full Wheels 57mm pair Formula Four 99A urethane with the Lock-In Full shape. Formula Four 99A is made for speed and lasting control on all surfaces, and it's one of Spitfire's most ridden duros worldwide.
At 57mm x 40.2mm, with a 27.5mm riding surface, bigger wheels like this roll faster and smoother for bowls, transition, and rough ground. Sold as a set of 4.
Who These Wheels Are For
- Skaters who want stable lock-ins on all terrain
- Bowl, pool, and transition skaters
- Skaters who want Spitfire's most ridden duro
- Spitfire fans
Features
- Formula Four 99A urethane
- Formula Four urethane: unmatched flatspot resistance and smooth anti-stick slide, per Spitfire
- Lock-In Full shape
- 57mm diameter, 40.2mm wide, 27.5mm riding surface
- Set of 4
Benefits
- Speed and lasting control on all surfaces
- Stable lock-ins on all terrain
- Bigger wheels like this roll faster and smoother for bowls, transition, and rough ground
Specs
| Brand | Spitfire |
| Formula | Formula Four |
| Durometer | 99A |
| Shape | Lock-In Full |
| Diameter | 57mm |
| Width | 40.2mm |
| Riding Surface | 27.5mm |
| Includes | Set of 4 wheels |
Compare Formula Four 99A Lock-In Full Sizes
Every size in this line uses the same formula and shape.
| Size | Width | Riding Surface |
|---|---|---|
| 54mm | 38mm | 25mm |
| 55mm | 39.5mm | 26.8mm |
| 57mm (this page) | 40.2mm | 27.5mm |
Complete Your Setup
New wheels deserve fresh bearings. Spitfire makes three tiers:
- Spitfire Cheapshots Bearings (Good): Spitfire's base-level bearing, tested by the pro team, with removable black shields to keep the crud out.
- Spitfire Classics Bearings (Better): Superfast and durable, with heat-resistant chromium steel rings, removable nylon cages, and blue removable shields.
- Spitfire Burners Bearings (Best): Spitfire's high-performance pick, with polished honed races and high carbon chromium steel, packed in a reusable tin.
FAQ
Is 99A hard or soft?
Hard. 99A is the standard street and park hardness: fast, with a controllable slide.
What is the Lock-In Full shape good for?
Stable lock-ins on all terrain. Spitfire describes it as a wider version of the Lock-In shape: asymmetrical, with a concave cut outside for less weight and a straight-edge lock-in inside for control on all terrain.
What size wheels should I get?
Smaller wheels (50 to 52mm) are light and technical, 53 to 54mm is the street and park go-to, and 55mm and up adds speed for transition and rough ground. See our skateboard wheels guide for more.