AKOGAN

iTrader: (1)

I want to put the 6th gen 18" maxima wheels on my 02 max and was wondiring about tire size to get. A lot of people have said to go with 245/40/18 but some tire shops are saying that that size is too wide for a 7.5" wide rim. Do you guys thing that I should get the stock size 245/45/18? or is that too big. Does anyone have those wheels on their max and what size tires are you running? Any advise would be great.

irish44j

iTrader: (38)

245/40/18 and 245/45/18 are the same width.....

the "245" part is the tire width.
the 40/45 part is the profile height (it is a % of width)
the 18 obviously is the rim size.....

Jaws

That is true as far as the tire width, but I know from experience in looking for wider rubber that strangely enough a 235/50/17 is OK for 17x7 rim but a 235/45/17 is not (according to tire manufacturers), so profile does play a role. Checking Michelin's website, the rim width for the 245/40/18 Pilot Sport A/S is 8"+ and for the 45 series tire it is 7.5"+. Count on Nissan to cheap out by going with the narrowest rim

irish44j

iTrader: (38)

that's because if the profile is lower and you go wider, the sidewall angle will be far from "vertical" and apparently that's no good. A little more sidewall in the same width results in an angle closer to vertical.

hmmm...what a bad explanation. But I need to go drink now, no time to rewrite it!...

Maximadmoiselle

iTrader: (1)

No, your explanation is perfect. It makes complete sense. If they're far from "vertical", they'll wear out too fast blah blah. Happy drinking!!!