Spitfire Formula Four Tablets Wheels bring the brand's Formula Four urethane formula to a tablet-shaped wheel, built for consistent slide and long-lasting wear. Finished in Red at a 101D durometer, they're built for control-focused riders who want predictable performance without breaking down quickly. Formula Four has long been a benchmark for durable, fast-rolling skate wheels. Available in 52mm, 53mm, and 54mm sizes, they're a dependable pickup for anyone after a proven wheel from Spitfire.