I'm running 295/35 18 on the wife's gt and 305/35 18 on my cobra. Depending on how low your car is you might have to roll the rear fenders. My cobra is slammed but i've never rubbed with rolled fenders.
"I'm not driving too fast...just flying too low"
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
90 7up vert - new project-07 DSG Focus -DD