275/35R19 vs 275/30R20 tire size
275/30R20 vs 275/35R19, diameter
-0.3% shorter
- Speedometer
- 60.2 mph
- At a true 60 mph
- Diameter
- 26.50 in
- Was 26.58 in
- Revs per mile
- 761
- Was 759
- 3% guideline
- Within
Car built for 275/35R19, now on 275/30R20.
275/35R19 and 275/30R20
| Measure | 275/35R19 | 275/30R20 | Difference |
|---|---|---|---|
| Width, mm | 275 | 275 | 0 |
| Sidewall, % of width | 35 | 30 | -5 |
| Rim, in | 19 | 20 | +1 |
| Section height, in | 3.79 | 3.25 | -0.54 |
| Diameter, in | 26.58 | 26.50 | -0.08 (-0.3%) |
| Circumference, in | 83.5 | 83.2 | -0.3 |
| Revs per mile | 759 | 761 | +2 (+0.3%) |
Fitting 275/30R20 instead of 275/35R19
Within the usual 3% diameter guideline.
- Needs 20 in wheels.
- Shorter sidewall: 0.5 in less.
Cars with 275/35R19
Cars with 275/30R20
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