TheKosherStogie

went with 345/30/20 and 295/30/19

as you can see the tire is MUCH BIGGER than stock. When the car was lifted the tire rubbed on the inside but once lowered it cleared. Hopeful there won't be rubbing at Willow Springs on Friday. I will update the thread

3LZZ06

Not sure why you would go with a rear tire that's 1.56" taller than stock...

It might give your computer a problem with such a discrepancy from stock.

TheKosherStogie

Wanted to try and go a bit wider. I run TC/SC off so don't really need the computers as long as abs is fine.

Also love the look of a meaty tire. Removes fender gap too.

Not a great pic but you'll get the idea

LFZ

That looks too big....but let us know how they work out at the track for you.

TheKosherStogie

I'll say this. I floored it in 2nd gear today and they hooked with no spinning. The ps2 the car came on would spin so easily so there's a lot more grip.

05dsom

I think they look good!
NO fender gap

RedZ4me

probably 'hooked' because you just changed your final drive axle ratio (numerically lower), sorry my opinion too big, should have gone 345/25's instead

TheKosherStogie

They don't make that size.

Doubt its that. It's the compound and the ps2 isn't that grippy

racerns

I am sure they stick better but that taller tire has the same effect as putting in taller gearing.

Joezone914

The car has a lot of torque so I am curious about the taller tire and the effect on acceleration. The taller tire will be great for mechanical grip at the track.

Please post your results and any negative findings.

EvanZR1

Curious to see what your results are. Also, why not use 285/35R19 on the front, it would have made the front to rear diameter difference much closer to stock and probably not caused any issues with TC/AH (1.3" vs 1-1.1" for stock).

TheKosherStogie

NO issues with ABS or Traction Control...did some runs with it off and some with it on Level 5

Front had rubbing when compressed and turned but was fine but my car was corner balanced/aligned and is lower than stock. But probably best for most to stick with stock sizes but rear had no issues rubbing.

Id say the tire is comparable to NT01. Felt very good.
First time at Willow Springs International Raceway with it and ran a 1:31:05 (car is stock besides muffler and alignment)

Dave Schotz

Nice times! Glad it all went well!
Dave

TheKosherStogie

🇺🇸🇺🇸

jenablist

Thank you very much for this!! I have been asking this question for the last 6 months!

Great stuff!!

where did the front tires rub? Inside of the tire or outside.. I assume outside but want to be sure

how much are you lowered?

I'm going for these on my extreme body, thinking to stretch it to 285/35/19 at the front tho.. puzzled if they will rub at stock hight

TheKosherStogie

Rubbed on outside but only with a lot of lock or under a lot of compression. Not sure how much lowered. Stock suspension but had it corner balanced

Robert R1

I was told the mag suspension can't be corner balanced?

Sucks about the rubbing. I already get front tire rubbing at Sears point caraseoul with the loaded front end and I think in t3 also so this would be worse. Will just wait On stock sized cup 2's.

I have a z06 with z07 package but our suspension and such should be same.

TheKosherStogie

I think they have stock sizing. At least for front. Rear I know u could go down to 325

seamus2154

I have the Zo7 also and get the rubbing up front when hard braking then turn in. Dealer said I was out of spec and raised it and it is still doing it at the track. I have heard of some guys changing the springs and keeping the mag suspension with good results. I just don't know what spring. After a long straight and hard braking it dives too much for me, really unsettles the car.

borlandboyd

Hello. I think the set up looks awesome. The rear wheels will give you no problems whatsoever and will not cause any lights to go off. Having the tires slightly taller will be no problem at all because the ZR one has too much torque horsepower for the larger diameter tires to have any effect on slowing the vehicle due to Essentially a slightly higher ratio. It actually may be faster because the ZR one can smoke about any tire with the traction control off regardless of the size unless it's a full on drag slick that's not warmed up. Actually I'm very surprised that it hooks up well. Did it hooked up well originally or only after The tires were worn in?

I see you mention that there was occasionally some rub on the fronts and the dealer adjusted. this can occur on the front w/ this size when hitting bumps and so forth. There are two screws and immediately underneath and arm. If you jack up the car and then use a jack to decrease the pressure on the arm I would guess you would be able to make Clearance by adjusting these. I am not sure but perhaps the dealer did not do this quite enough. Not sure but perhaps it may not look as good if raised to the degree necessary in the front. if you notice there are probably some marks on the wheel well. One should be towards the front of the car. And another at the very top of the well, and a minimal Mark posteriorly.

I would just make sure to look at the outer aspect of the tire as there may be some slight chipping or damage along the outer aspect of the upper edge of the tire as this aspect is where most prominently approximates the edge of the wheel well where the insert is attached. I am imagine the tires were cheaper as this is an unusual size sofa cause no problem I think it's a great deal. Hope this helps thanks – George