I have no spacers on my car.

 

what about 265 and 235 ?
only .3 of inch taller, .4 wider
and makes for better ride quality?

 

It really depends on the driver's perspective. I can't really say it's the ideal upgrade from a performance perspective. Logical, in terms of upsizing, yes- but I've read far more disappointing reviews with the 265s. The argument almost always leads directly to upsizing to 245/35 and 275/30 for a large number of F owners who upsized with factory wheels (08-11).

 

I went with the 265/35 and 235/40 set up in PSS and even though the theoretical numbers are only slightly greater diameter than stock, I must admit that I prefer the look of the wrapped front OEM size vs the 235-the 235 bulges just a bit compared to stock, but even that slight sidewall increase IMO does not look as good as stock.

I'm honestly thinking about biting the bullet and replacing the fronts to OEM size. Anyone want to buy 235/40 PSS fronts with ~300 miles on them?

The 265 Porsche OEM rear I have no problems with at all. It looks perfect, perhaps even better than OEM because it closes the wheel well gap a bit.

This set up does handle quite well, no issues there, and it has two positive attributes, one of them unexpected: 1) ride quality is a bit smoother, 2) the extra 0.3" actually allows the front of my car to safely clear the bottom step in my garage, something I couldn't do with the OEM PSS!

If I had to do it all over with the 2011 rims I would probably just go with stock size front and rear. Just my opinion.

 

For 2008-2011 wheels they recommend 245/35/19 Front & 275/30/19 Rear. I can't wait to try this setup. I need more grip.

 

Just ordered the 245/35/19 front & 275/30/19 rear setup everyone is recommending. I also have stock 2008 wheels. Got a little nervous when Tire Rack called back with the "Are you sure you want these sizes?" call. Hope it works both on and off the track!

 

Cool Man, fingers crossed!
Please post track review - when I was reading posts not many tracked F with this setup. And I must admit I wasn't sure how 245 on stock '08 rim would behave on track and in the end went with OEM size PSS

 

Will let you know after my track day mid June. Tracked last year on Pilot A/S 3s and they did pretty good for an all season (but not so well in the snow) I don't think the Contis will do as well since I feel like they give up some dry traction for wet/snow traction. I am also a little concerned about the shorter sidewall on the bigger tire.

 

so if they're 2012 rims, 265 / 235 is perfect right?
=)

 

Not really. 255 in the front is best (that's what I am running), and if you run Bridgestone, run 285s in the rear. If you run Michelin, the best you'll get is 275.

 

Those sizes reduce overall tire height and sidewall,
I know the wider tread is great,
but what happens to ride quality for daily driving?

Isn't it best to try to keep as close to stock overall diameter as possible?

that why I am debating the 265 / 235
I have a 2102 w/ wider rims

 

Beyond ride quality, a shorter tire makes the gearing shorter and a taller tire makes the gearing longer. I've always been a fan of a shorter tire for quicker gears.

 

Here's pics of the 235/265 setup


It's a total trade off: the 245/275 is a bit lower than stock both front and back, this one is a bit taller.

 

Ride quality is definitely a bit better with the taller set up.

 

Conversely, I might mention that those wanting more sidewall and more tread could downsize to 18" diameter tires. A 255/40/18 in the front and 285/35/18 in the rear are nearly identical diameters to stock.