928SS

michelin sport cups. dumped my bridgestone s02's and what a diff!!!

80 tw, but amazing holding in the canyons and AX stuff. knocked 2 sec's off my AX times, but no bad manners on the street.

seem quiet enough, a bit pricey, but you get what you pay for sometimes.

worf928

A possibility for a quick and dirty way to check:

With the car on the ground turn the wheels to full lock and then look at the clearance on the portion of the body-colored plastic cladding/trim that wraps around into the rear of the front wheel wells. Do that on both sides. You can look at the front also, but it seems that it is the rear trim that rubs against the inner face of the tire when the width and/or section is too much. If you've got ~1cm of clearance between the trim and the corner/edge of the tire all the way to the ground you may be ok with 265/40. (That last is a bad description: think of a 1cm diameter pipe on the ground sticking up between the tire and the trim. It's tough to describe this without resorting to (bad) pictures.)

As a point of reference, our GTS with 255/45 will rub the trim at less than full-lock if the ride height isn't a few mm lower than spec so the trim can actually extend beneath the tire. At a stock height the tire would rub the trim before full lock. And, even with a lower ride height, on hard sharp turns, the outside tire will rub due to body roll. OTOH, It's fine with a 255/40.

So, that's why I say the extra 4mm of sidewall height on the 265/40 may be the issue.

Last, and as Ernest pointed out, the actual tire width may differ from model to model.

Edit: And one more thing: if your last alignment was not done with the steering rack centered then the phenomenon (poorly) described above may occur only on one side and not the other. Or, alternatively, an alignment with the rack centered might cure the problem.

hacker-pschorr

BF Goodrich kdw2

928SS

fwiw, the biggest I could cram on my OB are 265/35 18 Front and 295/30 18 Rear. rears start to rub on the control arm if the car is unweighted and have about 1/8" to the outer fender, fronts lightly rub on the fender liner under hard braking with near full lock on the wheel.

had to roll the fenders all around just for that. the extra rubber makes going on/off the trailer easy though

wheels are 9x18 w/ 66mm ft and 10.5x18 59mm rear, no spacers.

ew928

Gaz's Car And Driver article.

I'm liking what they say about the Hankook V12's. Too bad they only go to 255 section width.
But that's good enough for front tires.
Which is what I need now.

VehiGAZ

Thank you for making up for my laziness, Ernest!

I put a lot of stock in these multiple-tire/multiple-driver tests. They get a much better perspective than we do when we switch from tire A to tire B and like the change. Maybe one of us went from tire #9 to tire #5 and now recommend it to everyone... wrongly.

ShawnSmith

The C&D article is a nice one. I wish they'd put my personal perf/$ favorite in there - the Sumitomo HTR Z-III

John Veninger

Or I could take the 265's off the rear rims and mount them on the front rims to see how things fit.
I'll just use the Hoosier 275 wets I have for the rear to see how it drives

andy-gts

I have and love the goodyear F1 unidirectional, not great in snow but excellent in wet and dry and VERY quiet on the road as the gts was noisy the Khumo's.

John Veninger

So after much input and research I decided to go for the RE760's. We'll see how I like them after the Frenzy trip the First weekend in October.

Thanks for all the help.

MGW-Fla

I've had great success with Kuhmo Ecstas on several of our cars, including the 928s. And you can't beat the prices at the Tire Rack. Bridgestones on the 928s too. I say 255s up front & 275-295s on the rear work nicely too & look really sharp.

John Veninger

I went with the 255/275 setup.