Comparison
205/50 R17 vs 255/35 R18
Compared to 205/50 R17, 255/35 R18 is 1.1 mm shorter and changes the speedometer reading by -0.17%.
Current Tire
205/50R17
New Tire
255/35R18
205/50 R17
255/35 R18
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
-1.1 mm
-0.17%
Speedometer at 100
99.8 km/h
-0.17% error
Ground clearance
-0.5 mm
ride height delta
Sidewall change
-13.3 mm
revs/km: 500.7
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/compare/205-50-r17-vs-255-35-r18Detailed comparison
| Metric | 205/50 R17 | 255/35 R18 | Difference |
|---|---|---|---|
| Overall diameter | 636.8 mm | 635.7 mm | -1.1 mm (-0.17%) |
| Sidewall height | 102.5 mm | 89.3 mm | -13.3 mm |
| Circumference | 2.001 m | 1.997 m | -3.5 mm |
| Revs / km | 499.9 | 500.7 | +0.9 |
| Ground clearance | reference | -0.5 mm | -0.5 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 99.8 km/h | -0.17 km/h |
Verdict: excellent
Within ±3% — speedometer, ABS and traction control should behave normally.
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205/50 R17
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255/35 R18