I ran cup 2, conti and ended up going back to the oem dunlop race maxx. They have been my favorite so far.

 

thx what suspension geo do you run?

 

BBS Motorsport Monoblocks in 19 with Hoosiers

 

Soooo amazing!!! 19" are really proper and BBS Motorsport well....simply perfect!!

 

265/35/19 R7's have been around forever. You can find them here;
http://www.competitionmotorsport.com/R7-265-35-19-46925R7.htm

 

This has to be the best look so far. Definitely motorsports looking, a little more rubber, A little stickier rubber too with the Hoosiers.

 

So is the big benefit by going to 19's purely a matter of reducing unsprung weight and getting wider tires? Or is there a benefit to having more sidewall on the track?

 

waiting to see what 19" look like on RS and what tires will fit...
Would love to see a back to back comparison of stock vs. 19 and see how much improvement (if any)...

 

Bumping my question from two posts up......

 

One reason for 19 is for more tire options but not too many more, they also lower the car and look good.

 

I went 19s for the added tire option sooner than later.

 

19s allow one to run wider rubber 265/325 without any rubbing issues, allows for lighter wheels vs 20s, should improve comfort in the street from thicker sidewall, allows for more tire choices (MPSC2, Trofeo R, Dunlop sport max, continental, Hoosier R7s), changes the effective gear ratios due to being smaller in diameter, and look more motorsports like as compared to the 20s. You will have speedometer error and lose top end speed from the smaller rolling diameters. The car will also be lower to the ground, so probably more front lip rubbing. The lower Unsprung weight, in theory, should improve braking and acceleration. Because of the high limits of the GT3, unless one is an exceptional driver, he may never notice any improved lap times. IMO, a good driver should be able to improve lap times with 19 in wheels and more rubber.

 

Gotcha... So I get all those points. Here are two follow up questions-

1. I don't follow how the car is lower by using 19's? Is that because to overall diameter is shorter? Also affecting the speedo.....
2. So there's no merit to additional sidewall rubber helping with the 'rigors' of tracking/racing...?

 

1. Yes and Yes. About 1/2 in smaller diameter, so 1/4" lower. I haven't calculated speedo error amount yet. Keep in mind, the speedo error will add more miles to the car too. Not a big deal for most owners.

2. I have never seen anyone give info on sidewall and improvement. One thing to acknowledge, is that the sidewall is part of the suspension. A 15 in formula one tire is different than an 18" Tudor series race car tire. If one races at tracks with substantial curbing, then in theory the thicker sidewall protects the rim of the aggressive driver banging off curbs and also decreases energy applied to the other suspension components. Weight of the car comes into play too. A super light F1 car deflects a sidewall different than a street car due to weight. In drag racing, the taller sidewall is used to increase frictional grip at the line, and in off roading, taller sidewalls are used to allow for low PSI rock crawling.

 

must missed it
19" since 991 first showed up