Frankies65 said:
Nick - I was looking last night at how much room I had back there. It appears that 245's would fit no problem with the TTII's (4.5 BS). There is at least an inch between the tire and anything else.
What are you running (width wise) on yours? With all that power you're putting out 235's would seem to be awful narrow!
I'm actually considering getting new wheels with less BS to pull the tire away from the frame.
Frank
I run a 255 40 17 on a 17x8 wheel with 4.75 bs with rolled rear fenders and lowering springs. I also have rear disc brakes or else I would be running a 265 40 17 rear tire. The disc brakes change my track width slightly. The original question asked what would go on with no problems and no mods
I know 90% of the time 245 go right on the rear with the correct back spacing, but there is a lot of variance between mustangs so I like to make sure I preface my answers as such.
With no offense to others on this board I have yet to see a 65-6 mustang with 275 rear tires that were actually
under the fenders. I have seen 265 40 17 on a 65 on a 17x8 w/ 4.75 bs and a small spacer to keep it off the springs. He also has heavily rolled fenders like mine. As the sidewall size goes up, the overall width of the tire increases as the side walls flex out and bubble. Overall tire size has a lot to with the manufacture specs. 2 265 40 17 tires from different manufactures are completely different sizes with regard to section and overall width.
I know sometimes with the 275 in combination with a stiff stock height suspension or shackels that lift the rear and/or air shocks they fit without rubbing because of how stiff it is or because you have added items that artifically prevent the suspension from going through full range of motion. I will be sure to preface and say
it is my opinion that these setups are less than ideal and are a throw back to the late 70s early eighties in styling and function. But because I do not care for there does not mean they will not work for you...and hey..it is your car...don't let the opinion of a faceless poster weigh too heavily..if
you like the way the car looks thats all that is important.
AS a FYI too, the problem with airshocks is the shock is bacially supposrting the weight of the car, not the leaf springs. The air shocks bolts into sheet metal under/behind the rear seat and is not designed to hold that kinda weight. As time goes by the stress on the mounting pointing causes metal fatigue in the area and the whole top of the shock has been know to punch through.
One of the reasons I invested the time compiling/creating and continuing to spend time updating the Modyfied Wheel and Tire charts is because of the huge variance between identically equiped mustangs. As my charts have continued to grow you can start to see trends within the data as to what works 100% of the time, 90% of the time, 75% of the time without mods....and then what mods are possible..or from another direction what the widest tire I can fit with this set up is with 100% accuracy, 90% accuracy...etc.
