Forgeline fully-forged one piece monoblock wheels are machined entirely from a single 6061-T6 aluminum forging to create a wheel that is extremely stiff, exceptionally strong, and very lightweight. If you want the stiffest, strongest, and lightest racing wheel possible, then you want Forgeline one piece monoblock wheels. Available in 18″, 19″, 20″, 21″, and 22″ diameters in a range of offsets to fit most applications.