The Stovebolt Site Forums The Shop Area Driveline Tire selection help

Update on tires size. Friday I checked a few places from national chain type stores and received many different opinions, even one store corrected another store in the same chain. Finally, the one store went to a website and plugged in the numbers and printed the results for me. I did check my rims and they were the original 5" rims that I had powder coated a few months ago. Taking all information in consideration of the original 3.90 rear gears and the 0.72 OD in the T-5 along with the 235 motor I decided to try and get close to a 29" tire to keep the RPM's as low as possible on the original rims.

Here is what size I selected 225/75R-15 which has an overall diameter of 28.29" and fits the 5" rim. (Sidewall Height of 6.64, Section Width of 8.86, Tire Circumference of 88.87, and Revolutions per Mile of 735.24)

A 205/75R-15 has an overall diameter of 27.11" and fits a 5" rim. Sidewall Height of 6.05, Section Width of 8.07, Tire Circumference of 85.16, and Revolutions per Mile of 767.24)

A 215/75R-15 has an overall diameter of 27.70" and fits a 5" rim.(Sidewall Height of 6.35, Section Width of 8.46, Tire Circumference of 87.01, and Revolutions per Mile of 750.90)

A 235/75R-15 has an overall diameter of 28.88"(Sidewall Height of 6.94, Section Width of 9.25, Tire Circumference of 90.72, and Revolutions per Mile of 720.22)and fits a 6" rim not the 5" as Lugnutz said.

Thanks Whitedog, I noticed when I got to different sites the 6.70-15 tire gets converted into different sizes. I get mostly of 205/75R15, 215/70R15, and 235/60R15.