255/60R18 vs 265/60R18
265/60R18 is a safe swap for 255/60R18 by the usual ±3% rule: the diameter differs by +1.57%.
Speedometer and odometer
With 265/60R18 on a car calibrated for 255/60R18, the speedometer reads 59.1 mph when you're really doing 60, and the odometer under-counts by 1.6%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.5 mph |
| 45 mph | 45.7 mph |
| 60 mph | 60.9 mph |
| 70 mph | 71.1 mph |
| 80 mph | 81.3 mph |
Other sizes close to 255/60R18
- 255/60R18 vs 235/60R18-3.14%
- 255/60R18 vs 225/60R18-4.72%
- 255/60R18 vs 245/60R18-1.57%
- 255/60R18 vs 255/55R18-3.34%
- 255/60R18 vs 235/65R18-0.07%
- 255/60R18 vs 255/65R18+3.34%
- 255/60R18 vs 255/55R19-0.01%
- 255/60R18 vs 255/65R17+0.01%
- 255/60R18 vs 245/55R18-4.78%
- 255/60R18 vs 285/60R18+4.72%
- 255/60R18 vs 235/70R17-0.31%
- 255/60R18 vs 275/60R18+3.14%
Questions
Can I replace 255/60R18 with 265/60R18?
265/60R18 is a safe swap for 255/60R18 by the usual ±3% rule: the diameter differs by +1.57%.
What's the difference between 255/60R18 and 265/60R18?
265/60R18 is 0.47" taller and 10 mm wider; the sidewall is +0.24". At an indicated 60 mph you'd actually be doing 60.9 mph.
Will 265/60R18 fit on 255/60R18 wheels?
Both use a 18" rim, so the wheel diameter matches; check the wheel's width range for a 265 mm tire and the fender clearance.