Spitfire Formula Four 99D 52mm - 32.5mm Width

Spitfire Formula Four 99D 52mm skateboard wheels are a four-wheel street and park setup built around Formula Four urethane. The Conical Full version combines a 52mm diameter with a wide profile and a smooth riding surface.

Formula Four Size And Shape

The manufacturer lists the Conical Full 52mm wheel at 52mm in diameter, 32mm in width, and a 20mm riding surface. The same Formula Four range is offered in 99 and 101 duro hardness.

The Conical Full profile uses a wider riding surface and a cutaway design. That geometry distinguishes it from Spitfire's narrower Conical and Lock In's shapes, which use different width and riding-surface measurements at 52mm.

Urethane And Pack Contents

Formula Four urethane is specified for abrasion resistance, a controllable grip, and resistance to flat spots. The wheels have a smooth riding surface that initially feels grippy before wearing into a slide-ready finish.

The US listing identifies the set as four wheels. At 99D, the selected hardness sits below the 101D option in the same product range, while the 52mm size favors a lower setup than the larger 53mm, 54mm, and 56mm entries.

Street And Park Placement

A 52mm wheel is a compact size for street and park boards, where quick response and clearance matter more than the extra roll-over offered by larger wheels. The 32mm width gives the Conical Full version a broader footprint than the manufacturer's 52mm Conical shape, listed at 30mm wide.

The closest comparison is another Formula Four shape rather than a different wheel material. The 52mm Lock In's version measures 32mm wide and has a 15.5mm riding surface, while the Conical Full specification uses a 20mm riding surface; the broader riding area changes the balance between stability and a lighter, narrower feel.

Who This Setup Fits

Spitfire Formula Four 99D 52mm Conical Full wheels fit skaters who want a four-wheel urethane set for street or park skating, with a wide profile and a hard 99D specification. The size keeps the board close to the ground and the profile supplies more riding surface than the 52mm Lock In's option.

The tradeoff is equally specific: the Conical Full shape is wider than the standard Conical at 52mm, and the 99D hardness is not the softest Formula Four choice. This setup is best understood as a compact, hard wheel with a broad contact area, not as a larger cruising wheel.