Spitfire Formula 4 - Lock-Ins Skateboard Wheels - Lock-Ins - 99 Duro Size:52mm and ruthlessly functional

and ruthlessly functional

375” width offers a balanced platform with a medium concave for solid control

and smudge-free

Adjustable Aluminum Heelcup – Ensures a perfect boot-to-binding fit with added durability

32 Drawstrings

Spitfire Formula 4 - Lock-Ins Skateboard Wheels - Lock-Ins - 99 Duro Size:52mm and ruthlessly functionalDesigned for skaters who demand edge control and consistent performance, the Lock Ins bring a purpose built asymmetric profilestraight edge on one side for locked grinds, conical cut on the other for effortless slides. Matched with Spitfires Formula Four urethane in 99 duro for lasting speed and flat spot resistance, these wheels are built for tech, ledges and daily abuse. Key Features Asymmetric Lock Ins Profile: Straight edge side locks into grinds;