215/55R16 vs 235/45R17
235/45R17 is a safe swap for 215/55R16 by the usual ±3% rule: the diameter differs by +0.06%.
Speedometer and odometer
With 235/45R17 on a car calibrated for 215/55R16, the speedometer reads 60.0 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 | 45.0 mph |
| 60 mph | 60.0 mph |
| 70 mph | 70.0 mph |
| 80 mph | 80.0 mph |
Other sizes close to 215/55R16
- 215/55R16 vs 205/55R16-1.71%
- 215/55R16 vs 205/50R17-0.95%
- 215/55R16 vs 215/50R17+0.61%
- 215/55R16 vs 215/60R16+3.34%
- 215/55R16 vs 205/60R16+1.48%
- 215/55R16 vs 205/65R16+4.67%
- 215/55R16 vs 205/65R15+0.72%
- 215/55R16 vs 195/55R16-3.42%
- 215/55R16 vs 225/50R16-1.79%
- 215/55R16 vs 205/50R16-4.90%
- 215/55R16 vs 225/55R16+1.71%
- 215/55R16 vs 215/60R15-0.61%
Questions
Can I replace 215/55R16 with 235/45R17?
235/45R17 is a safe swap for 215/55R16 by the usual ±3% rule: the diameter differs by +0.06%.
What's the difference between 215/55R16 and 235/45R17?
235/45R17 is 0.02" taller and 20 mm wider; the sidewall is -0.49". At an indicated 60 mph you'd actually be doing 60.0 mph.
Will 235/45R17 fit on 215/55R16 wheels?
No — 215/55R16 needs a 16" wheel and 235/45R17 a 17" wheel. This is a plus/minus-size swap that changes wheels too.