Spitfire F4 Wheels Classic Swirl | 99D/55mm

Spitfire F4 Wheels Classic Swirl | 99D/55mm

Classic shape, Formula Four urethane, sized right in the middle.

These Formula Four Classics wear the Classic Swirl print on Spitfire's number one shape. At 55mm and 99D they sit right in the middle of the range, so they suit skaters who split time between street spots and the park.

Formula Four is Spitfire's performance urethane, built for flat-spot resistance and a smooth anti-stick slide, and it holds its size and shape for longer. The Classic profile has a medium-width riding surface with round sidewalls, so it grips through turns and slides predictably on ledges, curbs and coping.

Key Features

• Classic shape: medium-width riding surface with round sidewalls for control in every situation
• Formula Four urethane: Spitfire's performance formula for flat-spot resistance and an anti-stick slide
• 99D hardness: hard street and park duro with a predictable slide
• 55mm diameter: middle size that does street and park
• Set of four: enough for one board

Specs

• Diameter: 55mm
• Durometer: 99D (Spitfire scale)
• Shape/profile: Classic: Spitfire's number one shape: a medium-width riding surface with round sidewalls
• Formula/urethane: Spitfire Formula Four
• Best for: Street, park, all-round skating
• Bearings: Not included (fits standard 608 bearings)
• Sold as: Set of 4

About Spitfire

Spitfire Wheels started in San Francisco in 1987 and is still based there today, distributed through Deluxe alongside some of the city's best-known skate brands. The flame logo has been on the bottom of street, park and bowl setups ever since.

Today Spitfire is best known for Formula Four, its performance urethane built to resist flat spots, hold its shape and slide smoothly without sticking. It comes in a wide spread of shapes and hardnesses, from soft 80HD cruisers to hard 101D park wheels, so you can match the wheel to how and where you skate. Riders choose Spitfire because the wheels are consistent from set to set and simply last.

FAQs

What are the Spitfire F4 Classic Swirl 99D 55mm wheels best for?
Mixed sessions. 55mm is small enough for street and big enough to keep speed in the park. The Classic is Spitfire's most popular shape: a medium-width riding surface with round sidewalls. It's predictable and easy to control, so it works for street, park and transition alike.

What does 99D mean?
Spitfire rates hardness on its own Duro scale, written D or DU, and doesn't publish a conversion. Retailers generally list it on the A scale, so 99D is usually listed as 99A, a hard street and park wheel. It rolls fast on smooth concrete, grips well enough to set up tricks and slides predictably. On rough footpaths you'll feel more of the cracks than on a softer wheel.

What size wheel should I get, and do I need risers?
55mm is the all-rounder size. It's big enough to hold speed in the park and roll over rougher ground, but still light for street. Most standard trucks run 55mm wheels without risers.

Do they come with bearings?
No. They come as a set of four wheels without bearings. Any standard 608 skate bearing fits, so you'll need a set of eight bearings, and spacers if your bearings don't have them built in.

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Burn Four Ever. Spitfire, San Francisco since 1987.