Comparison
245/60 R18 vs 235/40 R19
Compared to 245/60 R18, 235/40 R19 is 80.6 mm shorter and changes the speedometer reading by -10.73%.
Current Tire
245/60R18
New Tire
235/40R19
245/60 R18
235/40 R19
Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
-80.6 mm
-10.73%
Speedometer at 100
89.3 km/h
-10.73% error
Ground clearance
-40.3 mm
ride height delta
Sidewall change
-53.0 mm
revs/km: 474.7
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/compare/245-60-r18-vs-235-40-r19Detailed comparison
| Metric | 245/60 R18 | 235/40 R19 | Difference |
|---|---|---|---|
| Overall diameter | 751.2 mm | 670.6 mm | -80.6 mm (-10.73%) |
| Sidewall height | 147.0 mm | 94.0 mm | -53.0 mm |
| Circumference | 2.360 m | 2.107 m | -253.2 mm |
| Revs / km | 423.7 | 474.7 | +50.9 |
| Ground clearance | reference | -40.3 mm | -40.3 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 89.3 km/h | -10.73 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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245/60 R18
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235/40 R19