I'm in need of some new tires and was wondering what sizes fit on the stock Speed6 rims. Do 225/45/R18's or 235/45/R18's fit with no rubbing? Or what tire size is suggested besides the 215/45/R18 that there seems to be only about 3 different tire manufacturers to choose from.

Please point me in the right direction as the Potenza's are SHEEITE!!!

225/45/18 Fit just fine and are a lot cheaper than 215/45/18. 225/40/18 are even cheaper, but I am not sure the load rating is correct for the MS6 with those.

The stock MS6 rim is 18" x 7" with a +55 offset. A 225/45 will fit perfect on it and is an approved size for a 7" rim. A 235/40 or 225/40 will also "fit", but they are not approved sizes for a 7" rim so in the interest of safety, it's not a good idea. A 225/40 rim needs a 7.5" rim, and a 235/40 needs a 8" rim.

thank you for the info... I was thinking of getting some General Exclaim UHP's... I've herd good things on these tires and I'm on a lower end budget for tires... Anyone disagree?