285/40R21 vs 275/35R22 tire size
275/35R22 vs 285/40R21, diameter
-1.3% shorter
- Speedometer
- 60.8 mph
- At a true 60 mph
- Diameter
- 29.58 in
- Was 29.98 in
- Revs per mile
- 682
- Was 673
- 3% guideline
- Within
Car built for 285/40R21, now on 275/35R22.
285/40R21 and 275/35R22
| Measure | 285/40R21 | 275/35R22 | Difference |
|---|---|---|---|
| Width, mm | 285 | 275 | -10 |
| Sidewall, % of width | 40 | 35 | -5 |
| Rim, in | 21 | 22 | +1 |
| Section height, in | 4.49 | 3.79 | -0.70 |
| Diameter, in | 29.98 | 29.58 | -0.40 (-1.3%) |
| Circumference, in | 94.2 | 92.9 | -1.2 |
| Revs per mile | 673 | 682 | +9 (+1.3%) |
Fitting 275/35R22 instead of 285/40R21
Within the usual 3% diameter guideline.
- Needs 22 in wheels.
- Shorter sidewall: 0.7 in less.
Cars with 285/40R21
Cars with 275/35R22
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