225/45R17 vs 295/30R18 tire size
295/30R18 vs 225/45R17, diameter
Same diameter
- Speedometer
- 60.0 mph
- At a true 60 mph
- Diameter
- 24.97 in
- Was 24.97 in
- Revs per mile
- 808
- Was 808
- 3% guideline
- Within
Car built for 225/45R17, now on 295/30R18.
225/45R17 and 295/30R18
| Measure | 225/45R17 | 295/30R18 | Difference |
|---|---|---|---|
| Width, mm | 225 | 295 | +70 |
| Sidewall, % of width | 45 | 30 | -15 |
| Rim, in | 17 | 18 | +1 |
| Section height, in | 3.99 | 3.48 | -0.50 |
| Diameter, in | 24.97 | 24.97 | 0 (-0.0%) |
| Circumference, in | 78.5 | 78.4 | -0.0 |
| Revs per mile | 808 | 808 | +0 (+0.0%) |
Fitting 295/30R18 instead of 225/45R17
Within the usual 3% diameter guideline.
- Needs 18 in wheels.
- 70 mm wider. Check rubbing at full lock.
- Shorter sidewall: 0.5 in less.
Cars with 225/45R17
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