255/40R19 vs 265/35R20 tire size
265/35R20 vs 255/40R19, diameter
+1.0% taller
- Speedometer
- 59.4 mph
- At a true 60 mph
- Diameter
- 27.30 in
- Was 27.03 in
- Revs per mile
- 739
- Was 746
- 3% guideline
- Within
Car built for 255/40R19, now on 265/35R20.
255/40R19 and 265/35R20
| Measure | 255/40R19 | 265/35R20 | Difference |
|---|---|---|---|
| Width, mm | 255 | 265 | +10 |
| Sidewall, % of width | 40 | 35 | -5 |
| Rim, in | 19 | 20 | +1 |
| Section height, in | 4.02 | 3.65 | -0.36 |
| Diameter, in | 27.03 | 27.30 | +0.27 (+1.0%) |
| Circumference, in | 84.9 | 85.8 | +0.9 |
| Revs per mile | 746 | 739 | -7 (-1.0%) |
Fitting 265/35R20 instead of 255/40R19
Within the usual 3% diameter guideline.
- Needs 20 in wheels.
Cars with 255/40R19
Cars with 265/35R20
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