215/85R16 vs 235/85R16

235/85R16 is 1.3" taller than 215/85R16 (4.4%)

Diameter difference+4.40%diameter 30.39" → 31.73"
215/85R16235/85R16
215/85R16235/85R16Difference
Overall diameter30.39"31.73"+1.34"
Section width8.46"9.25"+0.79"
Sidewall height7.19"7.86"+0.67"
Circumference95.5"99.7"+4.2"
Revolutions per mile664636−28
Wheel diameter16"16"±0"

Speedometer

ShowsActualDiff
30 mph31.3 mph+1.3
45 mph47.0 mph+2.0
60 mph62.6 mph+2.6
70 mph73.1 mph+3.1
80 mph83.5 mph+3.5

Gear ratio to match

CurrentEquivalent
3.423.57
3.553.71
3.733.89
4.104.28

235/85R16 is 1.34" taller than 215/85R16, a +4.40% change in diameter. That is more than the 3% many tire shops use as a limit, so plan on recalibrating the speedometer and checking ABS and stability control.

Ground clearance changes by 0.67" (half the diameter change), and the tire needs 0.67" more room above it.

235/85R16 is 0.79" wider. On the same wheel offset about half of that, 0.39", moves toward the suspension and half toward the fender.

Both fit a 16" wheel; the sidewall is 0.67" taller on 235/85R16.

Details: 215/85R16 in inches · 235/85R16 in inches · change sizes in the calculator

FAQ

What is the difference between 215/85R16 and 235/85R16?

235/85R16 is 1.34" taller (+4.40%) and 0.79" wider than 215/85R16.

Will 235/85R16 change my speedometer?

Yes, by +4.40%. When the speedometer shows 60 mph you would be going 62.6 mph.

Can I replace 215/85R16 with 235/85R16?

It is a +4.4% diameter change, larger than the common 3% guideline, so check clearance and plan to recalibrate.