SSR Wheels has unveiled the new wheel in the Professor line-up: the SSR Professor SP1. The three-piece SP1 is a bold yet elegant take on the classic 5-spoke design. Wheel diameter sizes are offered from 18" up to 20" with various widths, offsets, and disk types to choose from for the best looking fitment! The inner rim of the wheel is heat treated for strength, using the HTM (Heat Treatment Manufacture) process which allows for the use of a thinner material to save weight. With weight and high strength in mind, each section of the wheel is engineered using separate grades and thickness of aluminum according to its purpose. SSRs racing heritage and manufacturing innovations have allowed the creation of a 3 piece wheel that is both super lightweight and high in strength.