I would like to run a 8.5" width wheel up front..any rubbing issues?

Dave

 

have it on 8.5+52 and not even close to being a problem.. with stock susp or coilovers. 305/30's in the rear and no problem either..

 

At the risk of a temporary hijack...
Does anyone have any advice or perspective on the effects of changing tire widths - front versus back? I assume (though this is likely overly simplistic) that widening the tread in the rear will have the car understeering more than stock (i.e. the rear stick longer while the front starts to slip) and conversely oversteer if just the front track is widened. Widening both is anyones bet. Is this correct?
I'm asking because I was considering getting 305's when my rear tires gave out. But if they increase understeer, well, what fun is that?

 

changing a little bit isnt going to make much difference because some tires the compound is so different that its really like running a wider tire almost.... narrower sticky tires will grab more than wider not as sticky..

other thing is tires run like shoes.. each brand measures differently.. im running 245/305 INVO and put them next to my 235/295 stocks and the stocks are actually a little wider overall but more rounded sidewalls so thenew actually have wider treadblock..

if your staying same brand... going +10mm wont make much difference unless u got one hell of a good butt dyno... id say if anything you might think you have more oversteer cause the high tread rears not grabbing as well as your worn fronts.

 

Just be careful of overall diameter. The car can handle up to 255's easy but the diameter changes even if it is a 35 ratio on a 19" tire.

 

Purchased the new Bridgestone RE-11's in 245/35/19's and 305/30/19's. Under steer at the track was significantly improved. Don't know if this is due to the larger front diameters, or simply due to the stickier tires.

 

How are the Invos? Very interested in this tire.

Dave

 

I'd say "but the diameter changes because it is a 35 ratio on a wider tire". 35 is the ratio of the sidewall height to the tire width, and since 255 is wider than the stock 235, the diameter will change from 25.48 to 26.03 (2.2% change in circumference).

 

Correct, and a 245/35/19 is right at 25.8".

Dave

 

Any more feedback on these tires, zoomzoommo? I'm very interested in getting a set of these (in the sizes you have) and wanted to see what your experiences had been (grip, ride, road noise and turn in).

Appreciate any info you can provide!

 

yep. add's .35mm for every 1mm added to width, so 3.5mm taller for every size you go wider.... so once you go 3 sizes wider u need to drop a profile..

they are good but not the stickiest tire in the world... i like because quiet and ride good....

 

Here's a You Tube video from my car with the RE-11's. Overall, I'm quite pleased with the tires. Turn in is crisp, with a lot less under steer versus the Pirelli's previously used. The RE-11's are very predictable, with good feedback as the limits of adhesion are approached. The only negative -- the tires gain 6 to 8 psi as they heat up. Just watch the cold pressures to compensate. The tires are reasonably quiet, but that could change as they wear. Ride quality is comparable to the other tires I've used (Pirelli's and Conti-Sport 2's).

I'm really not that slow of a driver (video). The Civic Si was just really fast.

http://www.youtube.com/watch?v=PPWk0T7_ZAM

 

zoomzoom, how can you say it is a negitive that the tires heat up 6-8psi? How is this a negitive? Tires just with driving on the road heat up 4psi.
My tires at the track heat up 10psi easy.

How are the tires on regular street driving? How is the road noise and how are they in the rain? Thanks!

 

245/35 19's came standard with 8 1/2" wheels on the 2007 / 2008 GT3's. If the offset is proper you will have no problems.

 

GT3's came with 235/35/19 fronts not 245's just like the vanilla 997S.

Dave