275/35R19 vs 285/30R20 tire size
285/30R20 vs 275/35R19, diameter
+0.6% taller
- Speedometer
- 59.7 mph
- At a true 60 mph
- Diameter
- 26.73 in
- Was 26.58 in
- Revs per mile
- 754
- Was 759
- 3% guideline
- Within
Car built for 275/35R19, now on 285/30R20.
275/35R19 and 285/30R20
| Measure | 275/35R19 | 285/30R20 | Difference |
|---|---|---|---|
| Width, mm | 275 | 285 | +10 |
| Sidewall, % of width | 35 | 30 | -5 |
| Rim, in | 19 | 20 | +1 |
| Section height, in | 3.79 | 3.37 | -0.42 |
| Diameter, in | 26.58 | 26.73 | +0.15 (+0.6%) |
| Circumference, in | 83.5 | 84.0 | +0.5 |
| Revs per mile | 759 | 754 | -4 (-0.6%) |
Fitting 285/30R20 instead of 275/35R19
Within the usual 3% diameter guideline.
- Needs 20 in wheels.
Cars with 275/35R19
Cars with 285/30R20
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