The Formula Four Lock-Ins by Spitfire Wheels feature an innovative asymmetric design for enhanced control – one side is flat, and the other is rounded.
![Spitfire Wheels Lock-Ins - Red](https://cdn.shopify.com/s/files/1/0343/1094/6952/files/Spitfire_Lock-Ins_Red.jpg?v=1718021527)
![Spitfire Wheels Lock-Ins - Black](https://cdn.shopify.com/s/files/1/0343/1094/6952/files/Spitfire_Lock-Ins_Black.jpg?v=1718021526)
Three colours are available now, all in the classic 99a(DU)hardness.
54mm/Purple.
55mm/Red.
57mm/Black.
View all Spitfire Wheels products.