Comparison
245/70 R16 vs 205/45 R17
Compared to 245/70 R16, 205/45 R17 is 133.1 mm shorter and changes the speedometer reading by -17.76%.
Current Tire
245/70R16
New Tire
205/45R17
245/70 R16
205/45 R17
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-133.1 mm
-17.76%
Speedometer at 100
82.2 km/h
-17.76% error
Ground clearance
-66.6 mm
ride height delta
Sidewall change
-79.3 mm
revs/km: 516.5
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/compare/245-70-r16-vs-205-45-r17Detailed comparison
| Metric | 245/70 R16 | 205/45 R17 | Difference |
|---|---|---|---|
| Overall diameter | 749.4 mm | 616.3 mm | -133.1 mm (-17.76%) |
| Sidewall height | 171.5 mm | 92.3 mm | -79.3 mm |
| Circumference | 2.354 m | 1.936 m | -418.1 mm |
| Revs / km | 424.8 | 516.5 | +91.7 |
| Ground clearance | reference | -66.6 mm | -66.6 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 82.2 km/h | -17.76 km/h |
Verdict: danger
Over 5% diameter difference — likely to affect speedometer accuracy, ABS calibration and gearing. Not recommended without professional review.
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245/70 R16
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205/45 R17