Spitfire F4 Wheels Classic Swirl | 101D/58mm

Spitfire F4 Wheels Classic Swirl | 101D/58mm

The biggest Classic Swirl: 58mm of hard, fast Formula Four for big transition.

At 58mm and 101D, this is the Classic Swirl for skaters who live in bowls, pools and vert ramps. The big diameter holds momentum through long lines and the hardest Formula Four duro keeps it fast on smooth concrete.

Formula Four resists flat spots and holds its shape, even under hard slides and slashes. The Classic shape keeps a medium-width riding surface with round sidewalls, so a big wheel still feels controllable on coping and easy to slide out of a carve.

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
• 101D hardness: Spitfire's hardest duro for maximum speed and slide on smooth ground
• 58mm diameter: big wheel for speed in bowls and on vert
• Set of four: enough for one board

Specs

• Diameter: 58mm
• Durometer: 101D (Spitfire scale)
• Width: 35.8mm
• Contact patch (riding surface): 18mm
• Shape/profile: Classic: Spitfire's number one shape: a medium-width riding surface with round sidewalls
• Formula/urethane: Spitfire Formula Four
• Best for: Bowls, pools, vert, big transition
• 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 101D 58mm wheels best for?
Big transition: bowls, pools and vert, where speed matters more than weight. 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 101D 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 101D is usually listed as 101A, a step harder than 99D. It's the hardest duro on Spitfire's Formula Four size chart, so it's the fastest on smooth parks and slides the easiest, but it passes more vibration through on rough ground.

What size wheel should I get, and do I need risers?
58mm is a big wheel made for speed in bowls and transition, or for cruising rough ground. Expect to add a 1/8" riser on standard trucks, and 1/4" on low trucks, so the wheels don't touch the deck when you turn hard.

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.