Dangerous Don

Hey everyone, I've searched and searched, and advanced searched some more. I have a '15 z51, the car came factory with 19/20's and the rear tire is a 285/30 which is a 26.5" tall tire, what's the tallest tire that can be used with a factory height vehicle as the only drag radials I've been able to find average 28.5" tall which seems to me as too tall for the car and could do some damage? I've even looked into 18" rims which I'm still not sure if they will even work with the brake cooling ducts, and all of those drag radials also range from between 28-28.5+ inch tires. Any input would be greatly appreciated.

savage

ben@weaponx has what you want.

Ben@WeaponX

thanks David, yes I have an 18x11" forged 3pc drag wheel that has a perfect offset/spec

"BoneStock"

You can't fit drag radials on 20 inch wheels, they only come in 35 sidewalls and rub. I got 305/35 r 20 mickeys for mine and had to sell them because they were too tall.

savage

im running 18x11 inch wheels in the rear and 18x10 on the front, these are the rim sizes with factory offsets that i feel safe with. the new stingray is far from a widebody car. im very happy that even the z51 car fits 18's front and back. there are so many more tire sizes(choices) in 18's than 19's, 20's, 21's. also i have found offset means more on the c7 than c5's or c6's. on my 2002, 2008 it seemed that as long as the bolt pattern fit the tire/ wheel worked. on my c7 having the wrong offset by - 20mm on the rear even with a 315/30/18 tire destroyed my rear inner fender lips.this is why i spent the money on wheels with the right offset with my 2015 on the way. thanks

Stp94

So, am I to assume that even with the perfect offset I couldn't fit a larger tire under my car? I recently ordered some rims and I was planning to put 255/40/19 fronts and 315/35/20 rears. I was gonna stick with the Michelin Super Sport tires. This would in essence run into the same issue as others have with drag radials correct? Thanks!

Dangerous Don

Yeah the 315/35/20 is at 28.66 inches which from what my research has deemed to be way too big, our cars can't fit 28" tires near less bigger, so if you can cancel that order I would advise it.

Higgs Boson

another vote for Ben at Whippin Ex

18x11 or 18x12 with a high offset and a, IMO, 305 drag radial will hook just as good as a 315 or 325 without the extra weight and resistance. 26.5 or 27 inch height.

savage

i have posted a few times of the nightmare i had with my rear inner fender lips( they are not there anymore) and the car is traded. i talked to ben x about what would be SAFE for inner lips and work well, i went with the 18x11 because the hoosier i run is rated for a rim size 11 to 12, 315/30/18. the next size is 335/30/18 that would need the 12 inch but is never going to be SAFE to car. my thinking was even with all the neg. camber i plan to run autocross with might protect rear lips. but then the 12 inch might rub hard on the inside of wheel. there is only so much room back there. 315/30/18 on a 18x11 +78 offset is for me a safe way to go.

Higgs Boson

i agree, 11 inch 315 +78 should work fine

Stp94

Thanks for the heads up Don! I'm going to se about downsizing to a 305/30 series tire.

EcoBrick Bob

I have a Z51 on order.
Wondering if TSW Cray Hawks in 19" x 11" 73 offset on C7 would work with Michelin Pilot Super Sports in size 325 -30-19"????? They are 26.7" tall. Where might they rub? They should have more rear clearance than 78 offset 11" wheels. From TireRack specs, this tire is about 2" wider than stock 285, both in girth and tread.
This is a nice looking wheel with some dish.

Would like to install the widest tire possible without cracking a fender or experiencing inside rubbing issues.

savage

73 offset would bring the rear tire out( not in) and break the inner fender lips right off with a 325, the only chance you have ( i said chance) is to run a 83 maybe 85 offset with a 325 tire, then does it hit the inside of wheel? i ran a 315 with a 58 offset(18 inch wheel) and once there was so much damage to inner lips i cut them out. started on one side and cut the whole wheel well out. after that the tire still hit past the lip and sooner or later im sure the fender would have cracked. offset means alot but there is still a tire size limit. im done with taking chances, 78 offset with 315 is the biggest i will ever go. good luck