265/35R18 vs 275/30R19
275/30R19 is a safe swap for 265/35R18 by the usual ±3% rule: the diameter differs by +0.76%.
Speedometer and odometer
With 275/30R19 on a car calibrated for 265/35R18, the speedometer reads 59.5 mph when you're really doing 60, and the odometer under-counts by 0.8%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.2 mph |
| 45 mph | 45.3 mph |
| 60 mph | 60.5 mph |
| 70 mph | 70.5 mph |
| 80 mph | 80.6 mph |
Other sizes close to 265/35R18
- 265/35R18 vs 245/40R18+1.63%
- 265/35R18 vs 225/45R18+2.65%
- 265/35R18 vs 225/40R18-0.86%
- 265/35R18 vs 235/45R18+4.05%
- 265/35R18 vs 205/50R17-0.92%
- 265/35R18 vs 235/40R18+0.39%
- 265/35R18 vs 215/50R17+0.64%
- 265/35R18 vs 235/45R17+0.09%
- 265/35R18 vs 255/35R18-1.09%
- 265/35R18 vs 255/40R18+2.88%
- 265/35R18 vs 235/35R19+0.68%
- 265/35R18 vs 275/35R18+1.09%
Questions
Can I replace 265/35R18 with 275/30R19?
275/30R19 is a safe swap for 265/35R18 by the usual ±3% rule: the diameter differs by +0.76%.
What's the difference between 265/35R18 and 275/30R19?
275/30R19 is 0.19" taller and 10 mm wider; the sidewall is -0.40". At an indicated 60 mph you'd actually be doing 60.5 mph.
Will 275/30R19 fit on 265/35R18 wheels?
No — 265/35R18 needs a 18" wheel and 275/30R19 a 19" wheel. This is a plus/minus-size swap that changes wheels too.