Comparison
245/40 R19 vs 285/35 R19
Stepping from 245/40 R19 to 285/35 R19 keeps the 19-inch wheel but widens the section by 40 mm. This alternative fitment barely shifts the rolling circumference. The shorter sidewall gives the tire a firmer, more responsive feel and sharpens steering input.
Dashboard speed shifts only marginally — within the noise of normal OEM tolerance. Overall the swap sits inside the safe ±3% diameter window, so ABS, traction control and gearing behave normally.
TakeUseful when extra dry grip and stance matter more than a small fuel-economy hit.
Quick math: 285/35 R19 is 3.5 mm taller than 245/40 R19, shifting the speedometer by +0.52%.
Current Tire
New Tire
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
+3.5 mm
0.52%
Speedometer at 100
100.5 km/h
+0.52% error
Ground clearance
+1.8 mm
ride height delta
Sidewall change
+1.8 mm
revs/km: 466.7
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/compare/245-40-r19-vs-285-35-r19Detailed comparison
| Metric | 245/40 R19 | 285/35 R19 | Difference |
|---|---|---|---|
| Overall diameter | 678.6 mm | 682.1 mm | +3.5 mm (+0.52%) |
| Sidewall height | 98.0 mm | 99.8 mm | +1.8 mm |
| Circumference | 2.132 m | 2.143 m | +11.0 mm |
| Revs / km | 469.1 | 466.7 | -2.4 |
| Ground clearance | reference | +1.8 mm | +1.8 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 100.5 km/h | +0.52 km/h |
Verdict: excellent
Within ±3% — speedometer, ABS and traction control should behave normally.
Speedometer impact
At a true 100 km/h, your dashboard will read 100.5 km/h after switching to 285/35 R19 — a +0.52% offset. Use the speedometer error calculator to recheck for other indicated speeds, and the speedometer error guide for the full background.
Ground clearance change
The new tire's half-diameter changes ride height by +1.8 mm. Small differences are absorbed by suspension travel, but anything beyond ±10 mm can affect headlight aim, fender clearance and bump-stop margin. See the plus-sizing guide before committing.
Back to
245/40 R19
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285/35 R19
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