Ive seen 275/40/17s on the back of a 65 fastback....in fact he is a member here-
Im about to put 245/40/18s on the back of mine...and Im not going to cut anything...
It all depends on the offest of the wheel, how low the car is, exc...
I would get the dimensions of your current tire, the offset of your current wheel, measure how much more room you have, and calculate from there- No reason you shouldnt be able to get a 275 or something under there though- unless convertibles have less room then fastbacks- if the offset is right and stuff
Im about to put 245/40/18s on the back of mine...and Im not going to cut anything...
It all depends on the offest of the wheel, how low the car is, exc...
I would get the dimensions of your current tire, the offset of your current wheel, measure how much more room you have, and calculate from there- No reason you shouldnt be able to get a 275 or something under there though- unless convertibles have less room then fastbacks- if the offset is right and stuff
One of our members put together a chart years back.... it's updated and you can see what everyone else is running.
http://www.dodgestang.com/Tire Fitment Guide 65-6.pdf
http://www.dodgestang.com/Tire Fitment Guide 65-6.pdf