225/45R18 vs 245/35R19 tire size
245/35R19 vs 225/45R18, diameter
-0.8% shorter
- Speedometer
- 60.5 mph
- At a true 60 mph
- Diameter
- 25.75 in
- Was 25.97 in
- Revs per mile
- 783
- Was 777
- 3% guideline
- Within
Car built for 225/45R18, now on 245/35R19.
225/45R18 and 245/35R19
| Measure | 225/45R18 | 245/35R19 | Difference |
|---|---|---|---|
| Width, mm | 225 | 245 | +20 |
| Sidewall, % of width | 45 | 35 | -10 |
| Rim, in | 18 | 19 | +1 |
| Section height, in | 3.99 | 3.38 | -0.61 |
| Diameter, in | 25.97 | 25.75 | -0.22 (-0.8%) |
| Circumference, in | 81.6 | 80.9 | -0.7 |
| Revs per mile | 777 | 783 | +7 (+0.9%) |
Fitting 245/35R19 instead of 225/45R18
Within the usual 3% diameter guideline.
- Needs 19 in wheels.
- 20 mm wider. Check rubbing at full lock.
- Shorter sidewall: 0.6 in less.
Cars with 225/45R18
Cars with 245/35R19
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