205/70R16 vs 255/50R17 tire size
255/50R17 vs 205/70R16, diameter
-1.0% shorter
- Speedometer
- 60.6 mph
- At a true 60 mph
- Diameter
- 27.04 in
- Was 27.30 in
- Revs per mile
- 746
- Was 739
- 3% guideline
- Within
Car built for 205/70R16, now on 255/50R17.
205/70R16 and 255/50R17
| Measure | 205/70R16 | 255/50R17 | Difference |
|---|---|---|---|
| Width, mm | 205 | 255 | +50 |
| Sidewall, % of width | 70 | 50 | -20 |
| Rim, in | 16 | 17 | +1 |
| Section height, in | 5.65 | 5.02 | -0.63 |
| Diameter, in | 27.30 | 27.04 | -0.26 (-1.0%) |
| Circumference, in | 85.8 | 84.9 | -0.8 |
| Revs per mile | 739 | 746 | +7 (+1.0%) |
Fitting 255/50R17 instead of 205/70R16
Within the usual 3% diameter guideline.
- Needs 17 in wheels.
- 50 mm wider. Check rubbing at full lock.
- Shorter sidewall: 0.6 in less.
Cars with 205/70R16
Cars with 255/50R17
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