Will 245/45/18 fit
#2
Here's a Great Tire Size Chart:
http://www.rims-n-tires.com/rt_specs.jsp
Don't think you should go over 235 x 45 x 18! Someone else might know exactly! Depends also are the G6's 8" Wide? Our 18" SS Cobalt Wheels are 7" Wide so we put 225 x 45 x 18"! Might Even Consider 245 x 40 x 18" if the Wheel is 8" Wide and you want the Width ?
Hope this Helps?
http://www.rims-n-tires.com/rt_specs.jsp
Don't think you should go over 235 x 45 x 18! Someone else might know exactly! Depends also are the G6's 8" Wide? Our 18" SS Cobalt Wheels are 7" Wide so we put 225 x 45 x 18"! Might Even Consider 245 x 40 x 18" if the Wheel is 8" Wide and you want the Width ?
Hope this Helps?