SSR Professor SP1 wheels represent an enduring legend in Japanese wheel design, featuring a timeless, bold 5-spoke layout paired with authentic 3-piece modular construction. Engineered with a cast aluminum center disk joined to spun outer and inner rim shells, this wheel delivers structural integrity, exceptional sizing flexibility, and classic GT-racing heritage. The deep-set center face, step-lip profile, and perimeter pierce bolts create a muscular, aggressive stance that complements performance coupes, sports sedans, and widebody builds.