Post your pics with 17" wheels here!
so, i have the oem 20 inch tires. from what i can tell from the tire size calculators, 275/70/17 seems to be the best 17 inch tire to go with to keep the circumference the same without having to change anything in forscan or make the speedo around the same. sound about right?
so, i have the oem 20 inch tires. from what i can tell from the tire size calculators, 275/70/17 seems to be the best 17 inch tire to go with to keep the circumference the same without having to change anything in forscan or make the speedo around the same. sound about right?
A 275/75/17 would be closer circumference of 104.4”, 33.2” tall; only .75% larger than the 33” tall you have now. The 75 sidewall would be the closest matching to the circumference you have now on 20’s.
Last edited by 5ohLobo; Apr 21, 2025 at 04:14 PM.
Idk your tire size on the 20s but Im on factory 20s so Im assuming its 275/60/20. Circumference is 103.6; 33 tall. A 275/70/17 would be 101 32.2 tall/2.6% shorter.
A 275/75/17 would be closer circumference of 104.4, 33.2 tall; only .75% larger than the 33 tall you have now. The 75 sidewall would be the closest matching to the circumference you have now on 20s.
A 275/75/17 would be closer circumference of 104.4, 33.2 tall; only .75% larger than the 33 tall you have now. The 75 sidewall would be the closest matching to the circumference you have now on 20s.
I went from the factory 20's to a 33x12.5 17 and at 70mph on the speedo, I was actually only 1mph off on GPS. To me, that wasn't enough to bother making any Forscan changes. But to each their own.
Idk your tire size on the 20s but Im on factory 20s so Im assuming its 275/60/20. Circumference is 103.6; 33 tall. A 275/70/17 would be 101 32.2 tall/2.6% shorter.
A 275/75/17 would be closer circumference of 104.4, 33.2 tall; only .75% larger than the 33 tall you have now. The 75 sidewall would be the closest matching to the circumference you have now on 20s.
A 275/75/17 would be closer circumference of 104.4, 33.2 tall; only .75% larger than the 33 tall you have now. The 75 sidewall would be the closest matching to the circumference you have now on 20s.











