Spitfire Formula Four Lock-Ins Skateboard Wheels 99d 53mm Size:53 You can't argue with science

You can't argue with science

adjust and skate

Designed to fit Independent trucks as well as most other brands including Venture and Thunder*

Micro Groove Raceway Surfaces- linear micro-groove surfaces improve bearing lubrication

Keeps your edges ripping sharp so you carve harder

Spitfire Formula Four Lock-Ins Skateboard Wheels 99d 53mm Size:53 You can't argue with scienceFormula Four Urethane: An unbeatable, lasting performance urethane. Fast, long lasting, abrasion resistance with a smooth anti slip slide and controllable grip. 99 Duro: made for speed and lasting control on all surfaces. Lock Ins: Asymmetrical shape and design featuring a conical cut profile opposite a straight edge side. Lock on in.