Spitfire - Formula Four Conical Full Dark Grey Wheels 99D

Spitfire Formula Four Conical Full skateboard wheels are designed for versatility with a wide riding surface for grip and stability, and a conical shape for improved grind "lock-in" and control. They are made with durable Formula Four urethane that resists flat spots and are a popular choice for both street and transition skating due to their balanced performance, though the wide profile can make some sliding tricks more difficult. 

Design and features

Shape: A "full conical" shape with a wide profile and an asymmetric cutaway, which provides a large and stable riding surface.

Urethane: Made with Formula Four urethane, known for its durability, speed, and resistance to flat spotting.

Grind "lock-in": The conical cutaway on the sides of the wheel is designed to provide a more stable and secure lock onto ledges and rails.

Performance: Offers a balance of speed and control, with good grip on various surfaces due to the wide contact patch.

Weight: They are a heavier wheel than some other models, which can make them feel slightly less ideal for very technical flip tricks but provide more stability. 

Ideal for

All-around skating: Suitable for both street and transition, making them a versatile choice for many skaters.

Rougher terrain: The wider riding surface provides a smoother ride over cracks and rougher surfaces.

Grinding: The shape is specifically designed to help with locking into grinds on ledges and rails.

Stability: The wide profile offers great stability, especially at higher speeds. 

Considerations

Sliding: The wide profile can make some slides, like tail and nose slides, grippier and more difficult compared to a narrower wheel. This can be mitigated by using more wax.

Flip tricks: While still manageable for many flip tricks, their extra weight and width can make them slightly less ideal for very technical flatground compared to lighter, narrower wheels like the Spitfire Radial.