275/40R21 vs 285/35R22 tire size
285/35R22 vs 275/40R21, diameter
+0.7% taller
- Speedometer
- 59.6 mph
- At a true 60 mph
- Diameter
- 29.85 in
- Was 29.66 in
- Revs per mile
- 676
- Was 680
- 3% guideline
- Within
Car built for 275/40R21, now on 285/35R22.
275/40R21 and 285/35R22
| Measure | 275/40R21 | 285/35R22 | Difference |
|---|---|---|---|
| Width, mm | 275 | 285 | +10 |
| Sidewall, % of width | 40 | 35 | -5 |
| Rim, in | 21 | 22 | +1 |
| Section height, in | 4.33 | 3.93 | -0.40 |
| Diameter, in | 29.66 | 29.85 | +0.19 (+0.7%) |
| Circumference, in | 93.2 | 93.8 | +0.6 |
| Revs per mile | 680 | 676 | -4 (-0.6%) |
Fitting 285/35R22 instead of 275/40R21
Within the usual 3% diameter guideline.
- Needs 22 in wheels.
Cars with 275/40R21
Cars with 285/35R22
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