265/35R20 vs 305/30R20 tire size
305/30R20 vs 265/35R20, diameter
-0.4% shorter
- Speedometer
- 60.2 mph
- At a true 60 mph
- Diameter
- 27.20 in
- Was 27.30 in
- Revs per mile
- 741
- Was 739
- 3% guideline
- Within
Car built for 265/35R20, now on 305/30R20.
265/35R20 and 305/30R20
| Measure | 265/35R20 | 305/30R20 | Difference |
|---|---|---|---|
| Width, mm | 265 | 305 | +40 |
| Sidewall, % of width | 35 | 30 | -5 |
| Rim, in | 20 | 20 | 0 |
| Section height, in | 3.65 | 3.60 | -0.05 |
| Diameter, in | 27.30 | 27.20 | -0.10 (-0.4%) |
| Circumference, in | 85.8 | 85.5 | -0.3 |
| Revs per mile | 739 | 741 | +3 (+0.4%) |
Fitting 305/30R20 instead of 265/35R20
Within the usual 3% diameter guideline.
- 40 mm wider. Check rubbing at full lock.
Cars with 265/35R20
Cars with 305/30R20
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