Bolt Circle, 4.50 in. Backspace, Each - Old school looks in new school technology Vision American Muscle 561 Sport Mag Series wheels are sure to add the styling and performance that you desire. A classic hole-design, combined with one-piece cast construction, a sparkling gloss black finish, and milled window accents make Vision Wheels' 561 Sport Mags an all-around great choice. These wheels are offered in two sizes with several offset and backspacing options to fit everything from classic hot rods of the 50s and 60s to today's modern muscle cars and more.