255/70R16 vs 245/65R17 tire size
245/65R17 vs 255/70R16, diameter
-1.7% shorter
- Speedometer
- 61.0 mph
- At a true 60 mph
- Diameter
- 29.54 in
- Was 30.06 in
- Revs per mile
- 683
- Was 671
- 3% guideline
- Within
Car built for 255/70R16, now on 245/65R17.
255/70R16 and 245/65R17
| Measure | 255/70R16 | 245/65R17 | Difference |
|---|---|---|---|
| Width, mm | 255 | 245 | -10 |
| Sidewall, % of width | 70 | 65 | -5 |
| Rim, in | 16 | 17 | +1 |
| Section height, in | 7.03 | 6.27 | -0.76 |
| Diameter, in | 30.06 | 29.54 | -0.52 (-1.7%) |
| Circumference, in | 94.4 | 92.8 | -1.6 |
| Revs per mile | 671 | 683 | +12 (+1.7%) |
Fitting 245/65R17 instead of 255/70R16
Within the usual 3% diameter guideline.
- Needs 17 in wheels.
- Shorter sidewall: 0.8 in less.
Cars with 255/70R16
Cars with 245/65R17
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