Spitfire Formula Four 99A Conical Full Wheels 58mm are Formula Four 99A wheels in the Conical Full shape, built for stability and locking into grinds. 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 58mm x 37mm, with a 26.5mm 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 stability and locking into grinds
• 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
• Conical Full shape
• 58mm diameter, 37mm wide, 26.5mm riding surface
• Set of 4

Benefits

• Speed and lasting control on all surfaces
• Stability and locking into grinds
• Bigger wheels like this roll faster and smoother for bowls, transition, and rough ground

Specs

Compare Formula Four 99A Conical Full Sizes

Every size in this line uses the same formula and shape.

Conical Full in Other Durometers

The same Conical Full shape in a different formula or durometer, in this size or the closest one available.

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 Conical Full shape good for?

Stability and locking into grinds. Spitfire describes it as a wider version of the Conical shape, with a wide riding surface and cut-in sidewalls to decrease weight: a solid, controllable shape for 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.