Comparison
255/35 R18 vs 195/65 R15
Compared to 255/35 R18, 195/65 R15 is 1.2 mm shorter and changes the speedometer reading by -0.19%.
Current Tire
255/35R18
New Tire
195/65R15
255/35 R18
195/65 R15
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
-1.2 mm
-0.19%
Speedometer at 100
99.8 km/h
-0.19% error
Ground clearance
-0.6 mm
ride height delta
Sidewall change
+37.5 mm
revs/km: 501.7
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/compare/255-35-r18-vs-195-65-r15Detailed comparison
| Metric | 255/35 R18 | 195/65 R15 | Difference |
|---|---|---|---|
| Overall diameter | 635.7 mm | 634.5 mm | -1.2 mm (-0.19%) |
| Sidewall height | 89.3 mm | 126.8 mm | +37.5 mm |
| Circumference | 1.997 m | 1.993 m | -3.8 mm |
| Revs / km | 500.7 | 501.7 | +0.9 |
| Ground clearance | reference | -0.6 mm | -0.6 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 99.8 km/h | -0.19 km/h |
Verdict: excellent
Within ±3% — speedometer, ABS and traction control should behave normally.
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255/35 R18
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195/65 R15