Monoblock construction has definite advantages. Forged from 6061-T6 aluminum, the SP Series features superior balance because of monoblock’s extremely low radial runout factor. These 100% machined wheels are held to exacting tolerances. Lack of seams and joints means a leak-proof, true wheels for thousands and thousands of miles. Available in 18”, 19” and 20” diameters and all custom colors CCW offers.