245/60R18 vs 275/50R19
275/50R19 is a safe swap for 245/60R18 by the usual ±3% rule: the diameter differs by +0.85%.
Speedometer and odometer
With 275/50R19 on a car calibrated for 245/60R18, the speedometer reads 59.5 mph when you're really doing 60, and the odometer under-counts by 0.9%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.3 mph |
| 45 mph | 45.4 mph |
| 60 mph | 60.5 mph |
| 70 mph | 70.6 mph |
| 80 mph | 80.7 mph |
Other sizes close to 245/60R18
- 245/60R18 vs 235/60R18-1.60%
- 245/60R18 vs 235/55R18-4.73%
- 245/60R18 vs 265/60R18+3.19%
- 245/60R18 vs 225/60R18-3.19%
- 245/60R18 vs 245/65R17-0.12%
- 245/60R18 vs 255/55R18-1.80%
- 245/60R18 vs 235/65R18+1.53%
- 245/60R18 vs 245/55R19+0.12%
- 245/60R18 vs 255/65R18+4.99%
- 245/60R18 vs 265/50R19-0.48%
- 245/60R18 vs 255/60R18+1.60%
- 245/60R18 vs 245/55R18-3.26%
Questions
Can I replace 245/60R18 with 275/50R19?
275/50R19 is a safe swap for 245/60R18 by the usual ±3% rule: the diameter differs by +0.85%.
What's the difference between 245/60R18 and 275/50R19?
275/50R19 is 0.25" taller and 30 mm wider; the sidewall is -0.37". At an indicated 60 mph you'd actually be doing 60.5 mph.
Will 275/50R19 fit on 245/60R18 wheels?
No — 245/60R18 needs a 18" wheel and 275/50R19 a 19" wheel. This is a plus/minus-size swap that changes wheels too.