265/70R17 vs 235/80R17
235/80R17 is a safe swap for 265/70R17 by the usual ±3% rule: the diameter differs by +0.62%.
Speedometer and odometer
With 235/80R17 on a car calibrated for 265/70R17, the speedometer reads 59.6 mph when you're really doing 60, and the odometer under-counts by 0.6%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.2 mph |
| 45 mph | 45.3 mph |
| 60 mph | 60.4 mph |
| 70 mph | 70.4 mph |
| 80 mph | 80.5 mph |
Other sizes close to 265/70R17
- 265/70R17 vs 265/75R16+0.14%
- 265/70R17 vs 245/70R17-3.49%
- 265/70R17 vs 285/70R17+3.49%
- 265/70R17 vs 265/65R18-0.14%
- 265/70R17 vs 245/75R17-0.44%
- 265/70R17 vs 265/65R17-3.30%
- 265/70R17 vs 235/85R16+0.39%
- 265/70R17 vs 255/65R17-4.92%
- 265/70R17 vs 255/70R17-1.74%
- 265/70R17 vs 255/75R17+1.43%
- 265/70R17 vs 235/75R17-2.30%
- 265/70R17 vs 285/60R18-0.45%
Questions
Can I replace 265/70R17 with 235/80R17?
235/80R17 is a safe swap for 265/70R17 by the usual ±3% rule: the diameter differs by +0.62%.
What's the difference between 265/70R17 and 235/80R17?
235/80R17 is 0.20" taller and 30 mm narrower; the sidewall is +0.10". At an indicated 60 mph you'd actually be doing 60.4 mph.
Will 235/80R17 fit on 265/70R17 wheels?
Both use a 17" rim, so the wheel diameter matches; check the wheel's width range for a 235 mm tire and the fender clearance.