spencang

I just want to know if anyone has experience/knows the answer to my original question: 275s with 11" rims?

spencang

BTW, I have boxster 17s with 48 mm offset on right now with no issues. Widths are 255. Am I missing something or should the 45 mm offset on 18s be OK as a result

dillon410021

the tire will be stretched but it can work. the problem is that most tire shops will not mount a stretched tire. first make sure the wheels will clear and fit nice.

ian

Yes you are missing something, the 17s are 8.5 or 9 inch wheels right? If they are 9s the 11 inch wheel will have extend a full inch further out, and I am willing to bet you don't have an inch of clearance.

Dougs951

I run a 275 on a 47mm offset 17x9 and it just barely clears. And I run some heavy rear camber and have the fenders rolled a 275 on a 11" with that offset shouldn't fit under the car

audisport

What changed? Are you measuring the rim ? Are you doing it outter edge or at inner bead surface?

A 10" wheel will actually measure wider than 10 edge to edge.

Just making sure you're measuring correctly

Crackership

I have a set of 996 turbo twists with rear offset 45.. They do require spacers on an '86, but it's not much, and the margin for error is really small with that wide of a wheel. AZbanks has the same wheels on an S2, so there's some way to make them work on late offset.

FWIW, tire manufacturers are really inconsistent when it comes to actual width of tires. I've measured the inflated widths of a few tires to be sure, and, for instance, a 225 from Yokohama is 15mm wider than a 225 from Pirelli. That's a big variance. I have 285/35 Pirellis on the rear twists, and they are very stretched, whereas a buddy of mine has the same wheels with 275/35 BFG's and they are flat with no stretch.. So, I'd say 275's might work - it depends on the tire.

The good news is, most tire manufacturers list the acceptable wheel width range for their tires. Look on their website and see if they say it will work.

333pg333

Dave, what size are those rears?

Crackership

The wheels are 18x11et45

333pg333

Cool, thanks. I'm looking at some tasty 11's for another project also on an '86.

Tedro951

OP, to your original question, a 275 on an 11 will look worse than phone dials, but will probably hold air. My 285/30-18s on 10.5 is just a hair too narrow, but I couldn't find a 288/30-18.

spencang

Thanks Tedro & Crackership. I will check out the Michelin website and see...

spencang

According to Michelin, they fit on 11" rims: http://www.michelinman.com/tire-sele...2/tire-details

ian

And it is a moot point, the wheels won't fit on your car. TThe 11 inch 45 offset wheel is either 35 or 28mm further out than your current wheels (depending on them being 8.5s or 9s). And you can use an online calculator to confirm that:

http://www.1010tires.com/WheelOffsetCalculator.asp

Tedro951

The same chart shows the max width for my 285/30-18 N3 being 10.5.

It looks like it will fit, but even if it does, could you handle seeing that every time you get in and out of the car?

Forget the spacing and that the wheel may protrude from the body, one shouldn't be able to set a crescent wrench between the bead of the tire and the lip of the rim and expect it to stay put.