Quote:
Originally Posted by Spaceman Spiff
Does 245/40/18 work on stock rims for sure? Tirerack recommend 255/40/18. Pros/cons of 245 v 255?
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Tirerack will always recommend the stock sizes via their online tools.
Does 245/40/18 work in the wheel wells? Yes.
F-225/45/18 and R-255/40/18 are stock sizes; they're 26" in overall diameter.
The 245/40/18 size is 25.7" overall (on the Pilot Alpin PA4), so slightly smaller diameter than stock, in addition to being slightly narrower (in the rear) and wider (in the front). Rears are obviously no problem being smaller, and lots of people (myself included) run the 245/40/18 size a fronts, so they work there as well.
Does 245/40/18 work on the OEM 8x18 and 9x18 wheels? Yes.
The Pilot Alpin PA4 specs for their 245/40/18 allows for 8-9.5" wheels, so that size will work on the 8" fronts and the 9" rears
My experience is the 245 size on the 8" fronts will be a little sloppy (they were when I had 245/40/18 Michelin PSS on the 18x8 fronts, before I bought 18x9 replacements, but others may disagree). 245 on the 9" rears will work great.
I'm going with 245/40/18 all around in order to get a tire that's proven and highly rated. If that same tire was available in 225/45/18 and 255/40/18 sizes I'd go with those, but they're not available.
Blizzak LM-32 (F235/45/18 and R255/40/18) and Dunlop WinterSport 4D (F225/45/18 and R245/40/18) sizes are closer to stock, so those are options as well if you want a stagger. I'm not going with the LM-32 because I wasn't a huge fan of the LM-60s, and the 4Ds don't do as well as the PA4s in the tests I've seen.
This logic works for me, but your mileage may vary.