255/60R18 vs 225/60R19 tire size
225/60R19 vs 255/60R18, diameter
-1.4% shorter
- Speedometer
- 60.8 mph
- At a true 60 mph
- Diameter
- 29.63 in
- Was 30.05 in
- Revs per mile
- 681
- Was 671
- 3% guideline
- Within
Car built for 255/60R18, now on 225/60R19.
255/60R18 and 225/60R19
| Measure | 255/60R18 | 225/60R19 | Difference |
|---|---|---|---|
| Width, mm | 255 | 225 | -30 |
| Sidewall, % of width | 60 | 60 | 0 |
| Rim, in | 18 | 19 | +1 |
| Section height, in | 6.02 | 5.31 | -0.71 |
| Diameter, in | 30.05 | 29.63 | -0.42 (-1.4%) |
| Circumference, in | 94.4 | 93.1 | -1.3 |
| Revs per mile | 671 | 681 | +9 (+1.4%) |
Fitting 225/60R19 instead of 255/60R18
Within the usual 3% diameter guideline.
- Needs 19 in wheels.
- Shorter sidewall: 0.7 in less.
Cars with 255/60R18
Cars with 225/60R19
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