JayP

I gotta see this car.
The autox guys have function well before form. She won't look pretty but will handle like a slot car.

Scootin159

lol... with my massive 120whp I don't really have trouble controlling wheel spin under power on standard 215 street tires. More so what I'm going for is more cornering grip in auto-x format. With the A6 tires I won't be able to use them on a full length track anyways (would turn to goo in just a few laps).

Scootin159

Good to hear... I'm running the 2.5" koni's in the front with the spring perches cut off, so there's a good chance they'll fit. I'm sure they'll clear 'sitting still' (just due to the fact they'll be a good 2" shorter than the bottom of the fender), my biggest concern is under full braking while turning for a sharp corner.... if they'll hit the front & rear edges of the fender. I'm expecting them to stick out a good couple inches past the fender.

ritzblitz

Lol the C4s totally belong on an AE86.

I bet they would look ultra badass on a widebody 944 though. Man I think I might have to go for that...

RedGTS

I have 11" wide wheels in back, but 265 it cutting very close. You have to run widebody kit to get any larger

Naplesguy06

The profile of the tire has a lot to d o with the width, for example. I have 225 50 zr 16 in front with 245 24 zr 16 in rear and they are about the same width. Tire rack guy claimed that this is due to the differance in the aspect ratio of the tire. Bigger aspect ratio, increased width and contact patch. That tire size is standard for corvette, but corvette has 300 Hp stock, your n/a 944 is less than half of that horsepower - why would you want to do that?

Naplesguy06

245 45 16 in rear typo

Scootin159

That's interesting.... I was looking over the specs again, and it looks like the 275/35 is about 1" wider than the 225/45 (9.8" vs 10.8"). Maybe this isn't really worth anything after all. Seems like a lot of $$ to spend for another 1" of tire.

Anyways, as I stated before, the wider tires are not for better acceleration (though it still may help in some of the slower corners), but more so for lateral grip & braking.

adrial

Whats bumpsteer got to do with wide tires?

Jeremy Himsel

Umm what the hell are you talking about. Width is width. Aspect ratio is the relationship of the tire sidewall size in relationship to the width. A 225mm tire and a 245 mm tire are still going to be 225 and 245 mm's wide regardless of the aspect ratio.

Just so you know a 225/50/16 means the tire is 225 MM's wide, the sidewall is 50% of the width (or 112.5mm's) and the rim size is 16". Contact patch can change based upon rim widths but it's not a significant change as a percentage.

Scootin159

While you're mostly right, another thing to keep in mind is that 225 is not necessarily 225mm of tire. For instance, the specs for that A6 tire are:

225mm = 8.85826772 inches
275mm = 10.8267717 inches

225/45-15 = 8.8" of tread, 9.8" wide on 7.5" rim
225/55-15 = 8.7" of tread, 9.6" wide on 7.0" rim
275/35-15 = 10.1" of tread, 10.8" wide on 9.5" rim
275/50-15 = 10.0" of tread, 10.8" wide on 8.0" rim

As you can see the 225's do have roughly 225mm of tread, but the tire is actually another inch wider. Whereas the 275's are roughly 275mm wide, but have about 3/4" less tread. And that variance is only among one brand/style, when you mix brands it's even more inconsistent.

Jeremy Himsel

I agree that different tires spec have different tread widths even for the same size (across manufacturers), and yes the contact patch changes based upon rim width (stated above) but not based upon aspect ratio as Napels suggested. He has it bass ackwards.

PeteL

That's funny

2BWise

Don't remember how low your car is, but since you're running CSP the wheels don't have to stay completely under the fender. You can run whatever offset you want and have the wheel stick outside of the fender. The only issue would be if you would rub the top of the tire in the corners. Shouldn't be any issues with rubbing on the inside of the tire if you have enough offset.

Naplesguy06

Hey hold up, I was only reiterating what the Tire rack sales guy told me on the phone when I shopped tires. I couldnt understand why the aspect ratio related to the width either, but what he told me made some sense and he did mention that manufacturers vary on the numbers. I think the 225/50 and 245/45/15 sets are pretty common for the 951. I remember my vette took the 275/40/17 on all 4rs. I also remember for example, falken made a wider tire than goodyear due to the lip protector they build in to the tire bead.