235/50R20 vs 295/35R21 tire size
295/35R21 vs 235/50R20, diameter
-0.4% shorter
- Speedometer
- 60.3 mph
- At a true 60 mph
- Diameter
- 29.13 in
- Was 29.25 in
- Revs per mile
- 692
- Was 689
- 3% guideline
- Within
Car built for 235/50R20, now on 295/35R21.
235/50R20 and 295/35R21
| Measure | 235/50R20 | 295/35R21 | Difference |
|---|---|---|---|
| Width, mm | 235 | 295 | +60 |
| Sidewall, % of width | 50 | 35 | -15 |
| Rim, in | 20 | 21 | +1 |
| Section height, in | 4.63 | 4.06 | -0.56 |
| Diameter, in | 29.25 | 29.13 | -0.12 (-0.4%) |
| Circumference, in | 91.9 | 91.5 | -0.4 |
| Revs per mile | 689 | 692 | +3 (+0.4%) |
Fitting 295/35R21 instead of 235/50R20
Within the usual 3% diameter guideline.
- Needs 21 in wheels.
- 60 mm wider. Check rubbing at full lock.
- Shorter sidewall: 0.6 in less.
Cars with 235/50R20
Cars with 295/35R21
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