235/50R19 vs 305/35R20 tire size
305/35R20 vs 235/50R19, diameter
+0.5% taller
- Speedometer
- 59.7 mph
- At a true 60 mph
- Diameter
- 28.41 in
- Was 28.25 in
- Revs per mile
- 710
- Was 714
- 3% guideline
- Within
Car built for 235/50R19, now on 305/35R20.
235/50R19 and 305/35R20
| Measure | 235/50R19 | 305/35R20 | Difference |
|---|---|---|---|
| Width, mm | 235 | 305 | +70 |
| Sidewall, % of width | 50 | 35 | -15 |
| Rim, in | 19 | 20 | +1 |
| Section height, in | 4.63 | 4.20 | -0.42 |
| Diameter, in | 28.25 | 28.41 | +0.15 (+0.5%) |
| Circumference, in | 88.8 | 89.2 | +0.5 |
| Revs per mile | 714 | 710 | -4 (-0.5%) |
Fitting 305/35R20 instead of 235/50R19
Within the usual 3% diameter guideline.
- Needs 20 in wheels.
- 70 mm wider. Check rubbing at full lock.
Cars with 235/50R19
Cars with 305/35R20
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