265/60R18 vs 275/65R18
275/65R18 is outside the ±3% rule as a replacement for 265/60R18: the diameter differs by +5.10%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 275/65R18 on a car calibrated for 265/60R18, the speedometer reads 57.1 mph when you're really doing 60, and the odometer under-counts by 5.1%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.5 mph |
| 45 mph | 47.3 mph |
| 60 mph | 63.1 mph |
| 70 mph | 73.6 mph |
| 80 mph | 84.1 mph |
Other sizes close to 265/60R18
- 265/60R18 vs 235/60R18-4.64%
- 265/60R18 vs 245/70R17-0.05%
- 265/60R18 vs 245/60R18-3.10%
- 265/60R18 vs 255/55R18-4.84%
- 265/60R18 vs 265/65R18+3.42%
- 265/60R18 vs 235/65R18-1.61%
- 265/60R18 vs 265/65R17+0.14%
- 265/60R18 vs 255/65R18+1.74%
- 265/60R18 vs 255/60R18-1.55%
- 265/60R18 vs 285/60R18+3.10%
- 265/60R18 vs 275/60R18+1.55%
- 265/60R18 vs 265/55R19-0.14%
Questions
Can I replace 265/60R18 with 275/65R18?
275/65R18 is outside the ±3% rule as a replacement for 265/60R18: the diameter differs by +5.10%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 265/60R18 and 275/65R18?
275/65R18 is 1.56" taller and 10 mm wider; the sidewall is +0.78". At an indicated 60 mph you'd actually be doing 63.1 mph.
Will 275/65R18 fit on 265/60R18 wheels?
Both use a 18" rim, so the wheel diameter matches; check the wheel's width range for a 275 mm tire and the fender clearance.