Sport Max 503 The Sport Max 503 is in a class of its own. For those drivers who seek an unprecedented look for their car the Sport Max 503 is it. The Sport Max 503 comes in Black Machined with razor thin edging and features a unique ninja star design that vanishes during acceleration. The Sport Max 503 is available in 15 inch, 16 inch, 17 inch and 18 inch sizes.