235/60R18 vs 235/55R19
235/55R19 is a safe swap for 235/60R18 by the usual ±3% rule: the diameter differs by +0.26%.
Speedometer and odometer
With 235/55R19 on a car calibrated for 235/60R18, the speedometer reads 59.8 mph when you're really doing 60, and the odometer under-counts by 0.3%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.1 mph |
| 45 mph | 45.1 mph |
| 60 mph | 60.2 mph |
| 70 mph | 70.2 mph |
| 80 mph | 80.2 mph |
Other sizes close to 235/60R18
- 235/60R18 vs 235/55R18-3.18%
- 235/60R18 vs 235/65R17-0.26%
- 235/60R18 vs 265/60R18+4.87%
- 235/60R18 vs 225/60R18-1.62%
- 235/60R18 vs 255/50R19-0.22%
- 235/60R18 vs 245/60R18+1.62%
- 235/60R18 vs 225/55R18-4.67%
- 235/60R18 vs 255/55R18-0.20%
- 235/60R18 vs 235/65R18+3.18%
- 235/60R18 vs 255/60R18+3.25%
- 235/60R18 vs 245/55R18-1.69%
- 235/60R18 vs 255/60R17-0.19%
Questions
Can I replace 235/60R18 with 235/55R19?
235/55R19 is a safe swap for 235/60R18 by the usual ±3% rule: the diameter differs by +0.26%.
What's the difference between 235/60R18 and 235/55R19?
235/55R19 is 0.07" taller and 0 mm wider; the sidewall is -0.46". At an indicated 60 mph you'd actually be doing 60.2 mph.
Will 235/55R19 fit on 235/60R18 wheels?
No — 235/60R18 needs a 18" wheel and 235/55R19 a 19" wheel. This is a plus/minus-size swap that changes wheels too.