265/70R18 vs 275/70R18
275/70R18 is a safe swap for 265/70R18 by the usual ±3% rule: the diameter differs by +1.69%.
Speedometer and odometer
With 275/70R18 on a car calibrated for 265/70R18, the speedometer reads 59.0 mph when you're really doing 60, and the odometer under-counts by 1.7%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.5 mph |
| 45 mph | 45.8 mph |
| 60 mph | 61.0 mph |
| 70 mph | 71.2 mph |
| 80 mph | 81.4 mph |
Other sizes close to 265/70R18
- 265/70R18 vs 275/65R18-1.63%
- 265/70R18 vs 285/70R17+0.31%
- 265/70R18 vs 265/65R18-3.20%
- 265/70R18 vs 255/70R18-1.69%
- 265/70R18 vs 255/65R18-4.77%
- 265/70R18 vs 285/65R18-0.06%
- 265/70R18 vs 33x12.50R18+1.21%
- 265/70R18 vs 285/60R18-3.50%
- 265/70R18 vs 305/65R18+3.08%
- 265/70R18 vs 275/60R18-4.95%
- 265/70R18 vs 305/60R18-0.60%
- 265/70R18 vs 285/70R18+3.38%
Questions
Can I replace 265/70R18 with 275/70R18?
275/70R18 is a safe swap for 265/70R18 by the usual ±3% rule: the diameter differs by +1.69%.
What's the difference between 265/70R18 and 275/70R18?
275/70R18 is 0.55" taller and 10 mm wider; the sidewall is +0.28". At an indicated 60 mph you'd actually be doing 61.0 mph.
Will 275/70R18 fit on 265/70R18 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.