Comparison
255/40 R19 vs 265/35 R19
Stepping from 255/40 R19 to 265/35 R19 keeps the 19-inch wheel but widens the section by 10 mm. This setup trims or stretches rolling diameter by a small margin. The shorter sidewall gives the tire a firmer, more responsive feel and sharpens steering input.
The speedometer offset is small but measurable; worth keeping in mind if you watch the dash closely. Diameter change stays inside the conservative ±3% safety window — an OEM-safe fitment on most vehicles.
TakeReasonable performance-leaning swap as long as fender and suspension clearance check out.
Quick math: 265/35 R19 is 18.5 mm shorter than 255/40 R19, shifting the speedometer by -2.69%.
Current Tire
New Tire
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
-18.5 mm
-2.69%
Speedometer at 100
97.3 km/h
-2.69% error
Ground clearance
-9.3 mm
ride height delta
Sidewall change
-9.3 mm
revs/km: 476.4
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/compare/255-40-r19-vs-265-35-r19Detailed comparison
| Metric | 255/40 R19 | 265/35 R19 | Difference |
|---|---|---|---|
| Overall diameter | 686.6 mm | 668.1 mm | -18.5 mm (-2.69%) |
| Sidewall height | 102.0 mm | 92.8 mm | -9.3 mm |
| Circumference | 2.157 m | 2.099 m | -58.1 mm |
| Revs / km | 463.6 | 476.4 | +12.8 |
| Ground clearance | reference | -9.3 mm | -9.3 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 97.3 km/h | -2.69 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 97.3 km/h after switching to 265/35 R19 — a -2.69% 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 -9.3 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.
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255/40 R19
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265/35 R19
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