265/60R20 vs 275/65R20
275/65R20 is outside the ±3% rule as a replacement for 265/60R20: the diameter differs by +4.78%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 275/65R20 on a car calibrated for 265/60R20, the speedometer reads 57.3 mph when you're really doing 60, and the odometer under-counts by 4.8%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.4 mph |
| 45 mph | 47.2 mph |
| 60 mph | 62.9 mph |
| 70 mph | 73.3 mph |
| 80 mph | 83.8 mph |
Other sizes close to 265/60R20
- 265/60R20 vs 275/55R20-1.88%
- 265/60R20 vs 275/60R20+1.45%
- 265/60R20 vs 255/55R20-4.54%
- 265/60R20 vs 305/55R20+2.12%
- 265/60R20 vs 285/55R20-0.54%
- 265/60R20 vs 285/60R20+2.91%
- 265/60R20 vs 33x12.50R20+1.48%
- 265/60R20 vs 295/60R20+4.36%
- 265/60R20 vs 295/55R20+0.79%
- 265/60R20 vs 285/50R20-4.00%
- 265/60R20 vs 245/60R20-2.91%
- 265/60R20 vs 305/50R20-1.57%
Questions
Can I replace 265/60R20 with 275/65R20?
275/65R20 is outside the ±3% rule as a replacement for 265/60R20: the diameter differs by +4.78%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 265/60R20 and 275/65R20?
275/65R20 is 1.56" taller and 10 mm wider; the sidewall is +0.78". At an indicated 60 mph you'd actually be doing 62.9 mph.
Will 275/65R20 fit on 265/60R20 wheels?
Both use a 20" rim, so the wheel diameter matches; check the wheel's width range for a 275 mm tire and the fender clearance.