245/40R18 vs 245/35R19 tire size
245/35R19 vs 245/40R18, diameter
+0.1% taller
- Speedometer
- 59.9 mph
- At a true 60 mph
- Diameter
- 25.75 in
- Was 25.72 in
- Revs per mile
- 783
- Was 784
- 3% guideline
- Within
Car built for 245/40R18, now on 245/35R19.
245/40R18 and 245/35R19
| Measure | 245/40R18 | 245/35R19 | Difference |
|---|---|---|---|
| Width, mm | 245 | 245 | 0 |
| Sidewall, % of width | 40 | 35 | -5 |
| Rim, in | 18 | 19 | +1 |
| Section height, in | 3.86 | 3.38 | -0.48 |
| Diameter, in | 25.72 | 25.75 | +0.04 (+0.1%) |
| Circumference, in | 80.8 | 80.9 | +0.1 |
| Revs per mile | 784 | 783 | -1 (-0.1%) |
Fitting 245/35R19 instead of 245/40R18
Within the usual 3% diameter guideline.
- Needs 19 in wheels.
Cars with 245/40R18
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