255/35R19 vs 305/30R19 tire size
305/30R19 vs 255/35R19, diameter
+0.7% taller
- Speedometer
- 59.6 mph
- At a true 60 mph
- Diameter
- 26.20 in
- Was 26.03 in
- Revs per mile
- 770
- Was 775
- 3% guideline
- Within
Car built for 255/35R19, now on 305/30R19.
255/35R19 and 305/30R19
| Measure | 255/35R19 | 305/30R19 | Difference |
|---|---|---|---|
| Width, mm | 255 | 305 | +50 |
| Sidewall, % of width | 35 | 30 | -5 |
| Rim, in | 19 | 19 | 0 |
| Section height, in | 3.51 | 3.60 | +0.09 |
| Diameter, in | 26.03 | 26.20 | +0.18 (+0.7%) |
| Circumference, in | 81.8 | 82.3 | +0.6 |
| Revs per mile | 775 | 770 | -5 (-0.7%) |
Fitting 305/30R19 instead of 255/35R19
Within the usual 3% diameter guideline.
- 50 mm wider. Check rubbing at full lock.
Cars with 255/35R19
Cars with 305/30R19
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