dstock rules allow stock width and +- 1" diameter, I'm running a 2005 R53

anyone know if 15x7 meets this?

I think stock options were 15x5.5, 16x6.5 and 17x7

I hope it does not mean I have to find 16x7 or 15x6.5 wheels/tires, I have 15x8's on now I would prefer to keep 15's but I dont want to give up tire

 

No, 15x7 would not be a legal option for street class on an MCS because there was never a 16x7 factory wheel option available.

You could legally run either a 15x6.5 or 16x7 wheel however. You are probably best off with 16x7 or even 17x7 because of the wider wheel and more tire options available in those sizes.

 

ahh that sucks

I am going 16x7 the re71r come in that size, going with RPF1 wheels in 43mm offset with a 1 or 2mm spacer to get them out to the limit per rules