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Discussion Starter #1
The stock 235's are useless with the V6 power, I want to put 265/40R18's on new 18" wheels. Does anyone know if they will fit given the proper offset in the wheel?
 

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I'm running 245/40/18 on a 8" wide wheel with an offset of 50.

I have not had any problems with my setup. I'd have no clue if a 265 tire that is 20mm wider (almost an inch) will fit and not rub on the suspension parts. Without measuring anything, I'd be a little frightened to try something that wide.
 

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Discussion Starter #3
QUOTE (p-dro @ Feb 23 2010, 02:15 PM) index.php?act=findpost&pid=1639025
I'm running 245/40/18 on a 8" wide wheel with an offset of 50.

I have not had any problems with my setup. I'd have no clue if a 265 tire that is 20mm wider (almost an inch) will fit and not rub on the suspension parts. Without measuring anything, I'd be a little frightened to try something that wide.[/b]
I wanted to keep the speedo as close as possible. Running the 265 on an 18x9 wheel keeps everything lined up. Ultimately the question is, is there an offset that works given the wider tire.

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference Tread Width
235/45-18 4.2in 13.2in 26.3in 82.7in 766 0.0% 129.25 mm
245/40-18 3.9in 12.9in 25.7in 80.8in 784 -2.3% 147.00 mm
265/40-18 4.2in 13.2in 26.3in 82.8in 765 0.1% 159.00 mm

Maybe the guys at discount tire know?
 

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QUOTE (09SilverSGT6 @ Feb 23 2010, 01:02 PM) index.php?act=findpost&pid=1638982
The stock 235's are useless with the V6 power, I want to put 265/40R18's on new 18" wheels. Does anyone know if they will fit given the proper offset in the wheel?[/b]
At that size, no one is going to be able to TELL (look up) if they'll fit (especially 18x9) and not eventually destroy your wheel bearings. If you're convinced you have to go with +1" in width (read below otherwise), the only way to be relatively certain your okay is with a test fitting. That requires a decent local wheel shop --- by that I mean knowledgeable and skilled, something that we don't have at ALL in my area. A good shop won't snow you -- Town Fair Tire (northeast stores) will put whatever you ask them for and tell you it's great without a second thought.

OE tires are pretty much garbage (I can't speak for the 18s, but the 17s are ridiculous). Good rated all-seasons will blow the OE tires away . . . and if you're dropping this much cash, summer tires will definitely give you more grip than HP.
 

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QUOTE (09SilverSGT6 @ Feb 23 2010, 01:02 PM)
OE tires are pretty much garbage (I can't speak for the 18s, but the 17s are ridiculous).
Agreed, I was shocked at how poor these Michelin’s have performed in basic driving compared to other stock tires I’ve had. They are quite terrible thus far in winter.

I usually drive on the stock rubber for a couple years (hey I did over-pay for it with my car, - May as well use it, right?) and then replace it later when it’s done, but I think I may make an exception this time as winter driving has been hell thus far, lol.

& to the OP – You will need at least a 8.5-9” rim for 265’s to fit properly as you listed but good luck finding anything that wide with a large enough offset. I’ve been doing some searching for wider rims myself the past few months and it’s pretty slim in the et50+ once you go past 8”.
 

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Discussion Starter #6
RAYS Engineering 57 G07WT Wheel 18x9.0 / 5x114.3 / Offset +50 available for the low low price of $595.00 each.
 

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265 is overkill... straight-line acceleration really doesn't have anything to do with the width of your tire. go 245 max and use a properly offset wheel. anything else will seriously wear out your front suspension parts. falken has been putting out some nice tires and they are cheap at sears. i was close to buying goodyear's new F1 the last time i bought tires, but the extra 50 bones a tires just isn't worth it in my book.
 
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