since this is the second time you have posted this advice .......
I would think the importance of speedometer pinion/rear axle ratio being the "driving" factor in tire selection to be very minimal in the mind of a car enthusiast. Most often the tire/wheel combination is about a "look", changing the speedometer pinion to allow the speedometer to read accurately is a cause of tire selection not the other way around.
BTW - the article is a good read, has good information in it but suggesting this early a-body tire solution is comical. What corner(s) are you going to put this tire on?
Quote:
Because larger tires are easier to find that smaller, we can replace our orange 17-tooth speedometer pinion with a 16-tooth brown gear. Without changing the 2.93:1 axle gear ratio, our new corrected required tire diameter is 26.64" and would allow us to use a P225/70R15 tire (26.4" calculated static diameter). This would make our odometer record 0.9% more miles than actually driven.
Recalculate your 225/70/15, isn't it closer to 27.4"?