265/70R17 vs 275/65R18
Switching from 265/70R17 to 275/65R18 increases your tire's overall diameter by 1.5% (from 31.61" to 32.07"). At an indicated 60 mph, your actual speed would be about 60.9 mph.
265/70R17
Current- Overall diameter
- 31.61"
- Circumference
- 99.29"
- Sidewall height
- 7.3"
- Revolutions
- 638 /mile
275/65R18
New- Overall diameter
- 32.07" (+1.5%)
- Circumference
- 100.77" (+1.5%)
- Sidewall height
- 7.04"
- Revolutions
- 629 /mile