2008 mustang gt

[djslawn1]

Can anyone tell me what is the widest tire i can fit under the wheel well of 2008 mustang and not have clearance issues.It has 18x9 wheels on it

 

[oh9mustang]

Ejelta.com: Tire Size Calculator

Tire Tech at Tire Rack

Tire Tech Information - How to Read Speed Rating, Load Index & Service Descriptions

Here's more info on tires than you'll ever read, My guess would be somewhere around 315-40-18 on the back. These will never fit the front.

 

[cusp]

Steering Stops

Can anyone tell me what is the widest tire i can fit under the wheel well of 2008 mustang and not have clearance issues.It has 18x9 wheels on it

Also, it your putting on over sized front wheels, you need to also install the appropriate steering stops.