235/85R16 vs 32x11.50R15
32x11.50R15 is a safe swap for 235/85R16 by the usual ±3% rule: the diameter differs by +0.86%.
Side by side
| 235/85R16 | 32x11.50R15 | Difference | |
|---|---|---|---|
| Overall diameter | 31.73" | 32.00" | +0.27" (+0.86%) |
| Section width | 235 mm | 292 mm | +57 mm |
| Sidewall | 7.86" | 8.50" | +0.64" |
| Rim | 16" | 15" | -1" |
| Circumference | 99.7" | 100.5" | +0.9" |
| Revs per mile | 636 | 630 | -5 |
| Ride height | — | — | +0.14" |
| Speedometer reads 60 mph | 60.0 | 60.5 | +0.5 mph |
Speedometer and odometer
With 32x11.50R15 on a car calibrated for 235/85R16, the speedometer reads 59.5 mph when you're really doing 60, and the odometer under-counts by 0.9%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.3 mph |
| 45 mph | 45.4 mph |
| 60 mph | 60.5 mph |
| 70 mph | 70.6 mph |
| 80 mph | 80.7 mph |
Other sizes close to 235/85R16
- 235/85R16 vs 265/70R17-0.38%
- 235/85R16 vs 265/75R16-0.25%
- 235/85R16 vs 245/75R16-3.97%
- 235/85R16 vs 245/75R17-0.82%
- 235/85R16 vs 265/70R16-3.54%
- 235/85R16 vs 235/80R17+0.24%
- 235/85R16 vs 285/75R16+3.47%
- 235/85R16 vs 215/85R16-4.22%
- 235/85R16 vs 305/70R16+3.41%
- 235/85R16 vs 275/70R16-1.80%
- 235/85R16 vs 255/85R16+4.22%
Questions
Can I replace 235/85R16 with 32x11.50R15?
32x11.50R15 is a safe swap for 235/85R16 by the usual ±3% rule: the diameter differs by +0.86%.
What's the difference between 235/85R16 and 32x11.50R15?
32x11.50R15 is 0.27" taller and 57 mm wider; the sidewall is +0.64". At an indicated 60 mph you'd actually be doing 60.5 mph.
Will 32x11.50R15 fit on 235/85R16 wheels?
No — 235/85R16 needs a 16" wheel and 32x11.50R15 a 15" wheel. This is a plus/minus-size swap that changes wheels too.