215/45R18 vs 275/35R18 tire size
275/35R18 vs 215/45R18, diameter
-0.2% shorter
- Speedometer
- 60.1 mph
- At a true 60 mph
- Diameter
- 25.58 in
- Was 25.62 in
- Revs per mile
- 788
- Was 787
- 3% guideline
- Within
Car built for 215/45R18, now on 275/35R18.
215/45R18 and 275/35R18
| Measure | 215/45R18 | 275/35R18 | Difference |
|---|---|---|---|
| Width, mm | 215 | 275 | +60 |
| Sidewall, % of width | 45 | 35 | -10 |
| Rim, in | 18 | 18 | 0 |
| Section height, in | 3.81 | 3.79 | -0.02 |
| Diameter, in | 25.62 | 25.58 | -0.04 (-0.2%) |
| Circumference, in | 80.5 | 80.4 | -0.1 |
| Revs per mile | 787 | 788 | +1 (+0.2%) |
Fitting 275/35R18 instead of 215/45R18
Within the usual 3% diameter guideline.
- 60 mm wider. Check rubbing at full lock.
Cars with 215/45R18
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