Spitfire Formula Four 99A OG Classics Wheels 54mm pair Formula Four 99A urethane with the OG Classics 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 54mm x 32.3mm, with a 22.2mm riding surface, this mid size is the go-to for street and park. Sold as a set of 4.

Who These Wheels Are For

• Skaters who want a wide, old-school feel without the weight
• Street and park 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
• OG Classics shape
• 54mm diameter, 32.3mm wide, 22.2mm riding surface
• Set of 4

Benefits

• Speed and lasting control on all surfaces
• A wide, old-school feel without the weight
• This mid size is the go-to for street and park

Specs

Compare Formula Four 99A OG Classics Sizes

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

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 OG Classics shape good for?

A wide, old-school feel without the weight. Spitfire describes it as Spitfire's original cutaway shape, with a wider riding surface lightened by cutaway sidewalls.

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.