215/85R16 vs 245/75R16

245/75R16 is 0.1" taller than 215/85R16 (0.3%)

Diameter difference+0.26%diameter 30.39" → 30.47"
215/85R16245/75R16
215/85R16245/75R16Difference
Overall diameter30.39"30.47"+0.08"
Section width8.46"9.65"+1.18"
Sidewall height7.19"7.23"+0.04"
Circumference95.5"95.7"+0.2"
Revolutions per mile664662−2
Wheel diameter16"16"±0"

Speedometer

ShowsActualDiff
30 mph30.1 mph+0.1
45 mph45.1 mph+0.1
60 mph60.2 mph+0.2
70 mph70.2 mph+0.2
80 mph80.2 mph+0.2

Gear ratio to match

CurrentEquivalent
3.423.43
3.553.56
3.733.74
4.104.11

245/75R16 is 0.08" taller than 215/85R16, a +0.26% change in diameter, inside the 3% range most shops treat as a safe swap.

Ground clearance changes by 0.04" (half the diameter change), and the tire needs 0.04" more room above it.

245/75R16 is 1.18" wider. On the same wheel offset about half of that, 0.59", moves toward the suspension and half toward the fender.

Both fit a 16" wheel; the sidewall is 0.04" taller on 245/75R16.

Details: 215/85R16 in inches · 245/75R16 in inches · change sizes in the calculator

FAQ

What is the difference between 215/85R16 and 245/75R16?

245/75R16 is 0.08" taller (+0.26%) and 1.18" wider than 215/85R16.

Will 245/75R16 change my speedometer?

Yes, by +0.26%. When the speedometer shows 60 mph you would be going 60.2 mph.

Can I replace 215/85R16 with 245/75R16?

Often yes: the diameter change of +0.3% is within the common 3% guideline. Check the load index, speed rating and clearance.