18 inch front tire size?
Thread Starter
Instructor
Joined: Feb 2013
Posts: 150
Likes: 102
18 inch front tire size?
I am putting on a set of 07 Z06 wheels 18X9.5 front, 19X12 rear.
I plan on re-machining the bolt circle to 120mm and enlarging the holes for the larger wheel studs, don't have the wheels yet so not sure if work needs to be done hub wise or not.
Planning on going with Supercar 3's 325/30ZR19 rear, diameter is .5 smaller than stock
275/35R18 front, .2 smaller than stock
Has anyone changed tire sizes similar to these and had errors with traction control or ABS?
Thanks Wayne
I plan on re-machining the bolt circle to 120mm and enlarging the holes for the larger wheel studs, don't have the wheels yet so not sure if work needs to be done hub wise or not.
Planning on going with Supercar 3's 325/30ZR19 rear, diameter is .5 smaller than stock
275/35R18 front, .2 smaller than stock
Has anyone changed tire sizes similar to these and had errors with traction control or ABS?
Thanks Wayne
Racer
Joined: Feb 2020
Posts: 377
Likes: 435
The car is very sensitive to size changes, it may screw with the traction control, once traction control is turned off it is fine. Stability control still works as advertised. When the car doesnt like the sizing, it wont shift, it will buck, it wont act normal; as soon as traction control is turned off it works as normal.
Currently running: 335/30/18 rear, 295/30/18 front (AR-1); havent noticed if the car doesnt like it... i immediately get in the car and turn TC off out of habit now.
I have also run:
265/35R18 and 315/30R18 (Ao52); the car's traction control did not like this combo, again; car is fine once TC is off.
Currently running: 335/30/18 rear, 295/30/18 front (AR-1); havent noticed if the car doesnt like it... i immediately get in the car and turn TC off out of habit now.
I have also run:
265/35R18 and 315/30R18 (Ao52); the car's traction control did not like this combo, again; car is fine once TC is off.
Last edited by J5isalive; Jul 26, 2021 at 04:53 PM.
Pro
Joined: Jul 2019
Posts: 532
Likes: 517
Oem front back diameter ratio is 5.4%. Your proposed tires are 4.3%. I would think it would be OK, but to be safe go with a 265 35 18 front, which is available for a 5.5% ratio. You don’t need to go big out front in this car.
Last edited by Egoncool; Jul 27, 2021 at 07:31 AM.
