The 235/40R19 is a common tire size for performance and sports cars such as BMW 3 Series, Volkswagen GTI, and Audi A4.
With a 94.0 mm sidewall (40% aspect ratio), this low-profile tire delivers sharp steering response and precise cornering grip, though the ride feels firmer over rough surfaces.
Compared to the baseline 245/40R19, this tire's overall diameter differs by -1.2% — a speedometer calibrated for 245/40R19 would read 101.2 km/h at an actual 100 km/h.
OE on the Audi A6 (C7) S-Line and BMW 3-Series/5-Series M-Sport 19" packages. Load index 92Y or 96Y reinforced. Wheel width 8.0-8.5" — staying within this range avoids tire-to-rim mismatch.
Low-profile sizes in this group prioritize steering response and lateral grip over sidewall protection from pothole impacts. Curb-rash on the rim and pinched sidewalls are the dominant failure modes; insurance-claim data shows these sizes register two to three times more wheel damage than 50+ aspect ratios. Plan for a spare set of rims if the route includes broken urban pavement.
| Tire Code | 235/40R19 |
| Section Width | 235 mm |
| Aspect Ratio | 40% |
| Rim Diameter | 19" |
| Sidewall Height | 94.0 mm |
| Overall Diameter | 670.6 mm / 26.40" |
| Circumference | 2106.8 mm / 82.94" |
| Revolutions per km | 474.7 |
| Revolutions per mile | 763.9 |
| Tire Code | OD (mm) | Δ mm | Δ % | Speedo at 100 km/h |
|---|---|---|---|---|
| 235/40R18 | 645.2 | -25.4 | -3.8% | 103.9 |
| 235/35R19 | 647.1 | -23.5 | -3.5% | 103.6 |
| 225/40R19 | 662.6 | -8.0 | -1.2% | 101.2 |
| 235/40R19 (current) | 670.6 | — | — | 100.0 |
| 245/40R19 | 678.6 | +8.0 | +1.2% | 98.8 |
| 235/45R19 | 694.1 | +23.5 | +3.5% | 96.6 |