265/65R17 vs 255/65R18 tire size
255/65R18 vs 265/65R17, diameter
+1.6% taller
- Speedometer
- 59.1 mph
- At a true 60 mph
- Diameter
- 31.05 in
- Was 30.56 in
- Revs per mile
- 650
- Was 660
- 3% guideline
- Within
Car built for 265/65R17, now on 255/65R18.
265/65R17 and 255/65R18
| Measure | 265/65R17 | 255/65R18 | Difference |
|---|---|---|---|
| Width, mm | 265 | 255 | -10 |
| Sidewall, % of width | 65 | 65 | 0 |
| Rim, in | 17 | 18 | +1 |
| Section height, in | 6.78 | 6.53 | -0.26 |
| Diameter, in | 30.56 | 31.05 | +0.49 (+1.6%) |
| Circumference, in | 96.0 | 97.6 | +1.5 |
| Revs per mile | 660 | 650 | -10 (-1.6%) |
Fitting 255/65R18 instead of 265/65R17
Within the usual 3% diameter guideline.
- Needs 18 in wheels.
Cars with 265/65R17
Cars with 255/65R18
What this cannot tell you
Diameter within 3% is a common shop guideline, not a maker spec.
Load index, offset and clearance are not in this data.
- Two or more sources agree
- One source
- Model-level or estimate
- Sources differ