u/r32_fan

It’s time for my Mustang to get new tires. My speedometer says more than I’m actually going and I did the math and it’s by such a factor that if I ran 70mm sidewall tires it woudl be accurate again. This leads me to believe the previous owner did this at some point. Many tire options I was looking at don’t come in 60mm sidewall plus I think the taller sidewall looks cool. Putting 225/70/R15 tires on my 1990 GT would kill many birds with one stone but I am unsure if they will fit. Has anyone tried this before? Is this a stupid Idea and I should just buy the right tires and adjust my speedo like a normal person? Any input would be great!