Comparison
225/35 R19 vs 235/40 R19
Stepping from 225/35 R19 to 235/40 R19 keeps the 19-inch wheel but widens the section by 10 mm. This tire combination noticeably changes overall diameter compared to OEM. The taller sidewall adds cushioning over potholes and rougher roads, with a softer overall ride.
The speedometer error is noticeable and may warrant a recalibration if you rely on indicated speed. The 3–5% diameter gap puts this in caution territory: doable on many cars, but verify clearance and consider recalibration.
TakeReasonable performance-leaning swap as long as fender and suspension clearance check out.
Quick math: 235/40 R19 is 30.5 mm taller than 225/35 R19, shifting the speedometer by +4.76%.
Current Tire
New Tire
Ground line · scaled comparison
Slight Difference
Within ±5% — usable, recalibration recommended
Diameter change
+30.5 mm
4.76%
Speedometer at 100
104.8 km/h
+4.76% error
Ground clearance
+15.3 mm
ride height delta
Sidewall change
+15.3 mm
revs/km: 474.7
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/compare/225-35-r19-vs-235-40-r19Detailed comparison
| Metric | 225/35 R19 | 235/40 R19 | Difference |
|---|---|---|---|
| Overall diameter | 640.1 mm | 670.6 mm | +30.5 mm (+4.76%) |
| Sidewall height | 78.8 mm | 94.0 mm | +15.3 mm |
| Circumference | 2.011 m | 2.107 m | +95.8 mm |
| Revs / km | 497.3 | 474.7 | -22.6 |
| Ground clearance | reference | +15.3 mm | +15.3 mm |
| Speedometer @ 100 km/h | 100.0 km/h | 104.8 km/h | +4.76 km/h |
Verdict: warning
Between 3% and 5% — noticeable speedometer drift; recalibration may be advisable.
Speedometer impact
At a true 100 km/h, your dashboard will read 104.8 km/h after switching to 235/40 R19 — a +4.76% 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 +15.3 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.
Back to
225/35 R19
Back to
235/40 R19
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