Comparison
205/70 R15 vs 225/45 R17
Compared to 205/70 R15, 225/45 R17 is 33.7 mm shorter and changes the speedometer reading by -5.04%.
Current Tire
205/70R15
New Tire
225/45R17
205/70 R15
225/45 R17
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-33.7 mm
-5.04%
Speedometer at 100
95.0 km/h
-5.04% error
Ground clearance
-16.9 mm
ride height delta
Sidewall change
-42.3 mm
revs/km: 501.8
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/compare/205-70-r15-vs-225-45-r17Detailed comparison
| Metric | 205/70 R15 | 225/45 R17 | Difference |
|---|---|---|---|
| Overall diameter | 668.0 mm | 634.3 mm | -33.7 mm (-5.04%) |
| Sidewall height | 143.5 mm | 101.3 mm | -42.3 mm |
| Circumference | 2.099 m | 1.993 m | -105.9 mm |
| Revs / km | 476.5 | 501.8 | +25.3 |
| Ground clearance | reference | -16.9 mm | -16.9 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 95.0 km/h | -5.04 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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205/70 R15
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225/45 R17