Spitfire Wheels Lockin Formula Four 55mm 99a
I lager.
749 kr
Spitfire Wheels Lock-Ins Formula Four 55mm 99a is made for skaters who want a fast, controlled wheel with extra precision for technical street skating. The Lock-Ins shape is designed to feel stable and “locked in” during grinds and when setting up on ledges, while still delivering the classic Formula Four speed and smooth slide control. With a 55mm diameter, you get a bit more roll and crack-handling than smaller sizes, making this an excellent all-terrain choice for street, parks, and transition.
Technical specs
Brand: Spitfire Wheels
Model / series: Formula Four
Wheel shape: Lock-Ins
Diameter: 55 mm
Durometer (hardness): 99a
Urethane features: high abrasion resistance, unmatched flatspot resistance, smooth anti-stick slide, high rebound compound
Use: all terrains
Pack size: 4 wheels
Key benefits
Lock-Ins shape for added grind control and a precise street-focused feel
55mm diameter for stronger speed retention and smoother roll on rough ground
99a hardness for fast, responsive performance in street and skateparks
Formula Four urethane for long-lasting durability and flatspot resistance
Smooth anti-stick slide for predictable release without sudden hook-ups
Performance & ride feel
These wheels feel fast and stable, with a more controlled “set-in” feeling compared to standard shapes — especially noticeable on ledges and during longer grinds. The 55mm size helps maintain speed and reduces harshness on crust, while Formula Four keeps slides smooth and consistent. If you want a wheel that’s built for street skating but still performs everywhere, this is a strong daily-driver option.
Fast roll with solid momentum retention
Stable feel with enhanced grind control
Smooth, predictable slides with reliable release
Durable urethane made for heavy street sessions
Great for technical street, parks, and transition
