I'm trying to find out if some wider wheels will fit my 08 M6. I have
ASA AR1 aftermaket wheels with an offset of +53mm / 5.91 backspacing / 5-114 bolt pattern. Can anyone tell me if 225/50-17 tires will cause any clearance issues. The OE size is 215/50-17. These are .3" wider and .4" taller. I keep getting conflicting information and don't want to spend $500+ on tires that won't fit.

 

I'm running ASA AR1's in 18x7.5 with 48mm offset outfitted with 225/45 tires and they fit just fine, now that I've had the rear fenders rolled. As for your case, I'd run 225/45s they'll be a little shorter, but will be closer to the stock size than 225/50's. This will make the speedo read about 5mph high @ 60mph, but that's better than it registering low (lower chance of accidental tickets)

 

Thanks much. According to the sizing chart it looks like a 225/50-17: 25.9" diameter is smaller than a 225/45-18: 26" diameter. The OEM 215/50-17 is 25.5" in diameter. I'm hoping the offset won't be a factor here. I was actually thinking I'd rather have the speedo read low since I'd be putting on fewer miles.

 

It is smaller. The issue is more that I'm not sure how going larger like that will affect clearance vertically. I know how the other size will fit.

 

What size wheels do you have; 17" or 18"?

 

17x7 w/53mm offset - see first post - 215/50-17

 

That's what I thought. So why then are you referring to 18" tires in the following quote:

You do know that 225/45 R18 tires will not fit on your rims. Right?

 

CKeffer in post #2 said he is running 225/45-18 without problems after rolling the fenders. I was just stating that the 225/50-17 I would like to run is actually smaller than the 225/45-18 that he is running without a problem. I currently have 215/50-17 on the wheels now. Both 215/50-17 and 225/50-17 will work with 17x7 wheels, correct?

 

Ahhh, got it. Yes, 225/50 R17 will fit quite comfortably on 7" wide rims.

 

If they are a smaller overall diameter than mine you should be golden, though you may need a slight roll in the rear or you may rub some.