nammaris

Hi Mates,
I have an automatic 2006 Ford Mustang GT V8, the car is still on its default gear ratio, and my old tires were a 235/50r18.

I changed the tires to 245/45r18, can you please advise what is the current gear ratio I need to set?

A table of "Gears Ratio vs Tires" maybe?

Thanks a gazillion times

RHuckster

If you have a tuner change from 740 revs/mile to 756 revs/mile. Right now your speedometer will be off slightly @ 2.1% to fast, when your speedo reads 60 mph it will actually be 58.7 mph.

Rick