225/55R18 vs 235/55R19Tire Size Comparison
The 5.2% diameter difference exceeds 5% and could affect ABS and traction control.
Comparison Details
Speedometer Correction
When switching from 225/55R18 to 235/55R19, your speedometer will differ from actual speed.
| Speedometer | Actual Speed | Difference |
|---|---|---|
| 30 km/h | 31.5 km/h | +1.5 km/h |
| 40 km/h | 42.1 km/h | +2.1 km/h |
| 50 km/h | 52.6 km/h | +2.6 km/h |
| 60 km/h | 63.1 km/h | +3.1 km/h |
| 70 km/h | 73.6 km/h | +3.6 km/h |
| 80 km/h | 84.1 km/h | +4.1 km/h |
| 90 km/h | 94.6 km/h | +4.6 km/h |
| 100 km/h | 105.2 km/h | +5.2 km/h |
| 110 km/h | 115.7 km/h | +5.7 km/h |
| 120 km/h | 126.2 km/h | +6.2 km/h |
| 130 km/h | 136.7 km/h | +6.7 km/h |
Vehicles Using These Sizes
Vehicles with 225/55R18
Vehicles with 235/55R19
Individual Tire Size Details
Practical Guidance
A 5.2% diameter difference is significantly outside the safe replacement range. Switching from 225/55R18 to 235/55R19 can cause dangerous speedometer inaccuracy, ABS/traction control malfunctions, and potential clearance issues. This change is not recommended without professional verification and possible ECU recalibration.
The 3% diameter tolerance is a widely accepted industry guideline referenced by the ETRTO and most vehicle manufacturers. When in doubt, consult your vehicle's owner's manual or a qualified tire professional. For U.S. tire safety standards and recalls, see the NHTSA Tire Safety page.
Frequently Asked Questions
Not Recommended. The overall diameter differs by 5.17%, width changes by 10mm.
Speedometer error will be 5.17%. At an indicated 100 km/h, actual speed is about 105.2 km/h.
Ground clearance changes by +18.2mm per side.