235/50R21 vs 285/35R22 tire size
285/35R22 vs 235/50R21, diameter
-1.3% shorter
- Speedometer
- 60.8 mph
- At a true 60 mph
- Diameter
- 29.85 in
- Was 30.25 in
- Revs per mile
- 676
- Was 667
- 3% guideline
- Within
Car built for 235/50R21, now on 285/35R22.
235/50R21 and 285/35R22
| Measure | 235/50R21 | 285/35R22 | Difference |
|---|---|---|---|
| Width, mm | 235 | 285 | +50 |
| Sidewall, % of width | 50 | 35 | -15 |
| Rim, in | 21 | 22 | +1 |
| Section height, in | 4.63 | 3.93 | -0.70 |
| Diameter, in | 30.25 | 29.85 | -0.40 (-1.3%) |
| Circumference, in | 95.0 | 93.8 | -1.2 |
| Revs per mile | 667 | 676 | +9 (+1.3%) |
Fitting 285/35R22 instead of 235/50R21
Within the usual 3% diameter guideline.
- Needs 22 in wheels.
- 50 mm wider. Check rubbing at full lock.
- Shorter sidewall: 0.7 in less.
Cars with 235/50R21
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