245/65R17 vs 245/60R18
245/60R18 is a safe swap for 245/65R17 by the usual ±3% rule: the diameter differs by +0.12%.
Speedometer and odometer
With 245/60R18 on a car calibrated for 245/65R17, the speedometer reads 59.9 mph when you're really doing 60, and the odometer under-counts by 0.1%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.0 mph |
| 45 mph | 45.1 mph |
| 60 mph | 60.1 mph |
| 70 mph | 70.1 mph |
| 80 mph | 80.1 mph |
Other sizes close to 245/65R17
- 245/65R17 vs 225/65R17-3.47%
- 245/65R17 vs 235/65R17-1.73%
- 245/65R17 vs 245/70R17+3.27%
- 245/65R17 vs 225/75R16-0.85%
- 245/65R17 vs 265/65R17+3.47%
- 245/65R17 vs 235/60R17-4.86%
- 245/65R17 vs 245/70R16-0.12%
- 245/65R17 vs 255/65R17+1.73%
- 245/65R17 vs 235/75R17+4.53%
- 245/65R17 vs 235/70R17+1.40%
- 245/65R17 vs 255/60R17-1.67%
- 245/65R17 vs 225/75R17+2.53%
Questions
Can I replace 245/65R17 with 245/60R18?
245/60R18 is a safe swap for 245/65R17 by the usual ±3% rule: the diameter differs by +0.12%.
What's the difference between 245/65R17 and 245/60R18?
245/60R18 is 0.04" taller and 0 mm wider; the sidewall is -0.48". At an indicated 60 mph you'd actually be doing 60.1 mph.
Will 245/60R18 fit on 245/65R17 wheels?
No — 245/65R17 needs a 17" wheel and 245/60R18 a 18" wheel. This is a plus/minus-size swap that changes wheels too.