235/60R18 vs 235/55R19 Side-by-side tire size comparison with specs and compatibility
Compatibility
+0.26% diameter difference
✓ Safe Swap
This tire swap is within the safe 3% diameter threshold. It should not cause issues with speedometer accuracy, ABS, or traction control systems.
Full Specifications Comparison
| Specification | 235/60R18 | 235/55R19 | Difference |
|---|---|---|---|
| Overall Diameter | 739.2 mm (29.1") | 741.1 mm (29.2") | +1.9 mm |
| Section Width | 235 mm (9.3") | 235 mm (9.3") | 0 mm |
| Sidewall Height | 141 mm | 129.3 mm | -11.7 mm |
| Circumference | 2322.3 mm | 2328.2 mm | +5.9 mm |
| Revolutions/Mile | 693 | 691 | -2 |
| Aspect Ratio | 60% | 55% | -5% |
| Rim Diameter | 18" | 19" | +1" |
Key Impact Summary
Ground Clearance
+0.9 mm
Speedometer Error
+0.26%
Width Change
0 mm
Sidewall Change
-11.7 mm
Speedometer Correction Table
When switching from 235/60R18 to 235/55R19, your speedometer will under-read. Here is the correction at common speeds:
| Speedometer Shows | Actual Speed (mph) | Difference |
|---|---|---|
| 30 mph | 30.1 mph | +0.1 mph |
| 40 mph | 40.1 mph | +0.1 mph |
| 50 mph | 50.1 mph | +0.1 mph |
| 60 mph | 60.2 mph | +0.2 mph |
| 70 mph | 70.2 mph | +0.2 mph |
| 80 mph | 80.2 mph | +0.2 mph |
| 90 mph | 90.2 mph | +0.2 mph |
| 100 mph | 100.3 mph | +0.3 mph |
| 110 mph | 110.3 mph | +0.3 mph |
| 120 mph | 120.3 mph | +0.3 mph |
What This Swap Means
Shorter sidewall: The 11.7mm decrease in sidewall height improves steering response and cornering precision. However, ride quality becomes firmer and the wheels are more vulnerable to pothole damage. This is a common trade-off when upsizing wheels (plus-sizing).
Ground clearance: Increases by 0.9mm, providing slightly better approach angles for off-road driving and speed bump clearance.
Vehicles Using 235/60R18
Vehicles Using 235/55R19
2025 Audi Q5 Premium Plus 45 TFSI quattro 2024 Audi Q5 Premium Plus 45 TFSI quattro 2023 Audi Q5 Premium Plus 45 TFSI quattro 2022 Audi Q5 Premium Plus 45 TFSI quattro 2025 Audi Q3 Prestige 40 TFSI quattro 2024 Audi Q3 Prestige 40 TFSI quattro 2021 Audi Q3 S line Premium Plus 2020 Audi Q3 S line Premium Plus 2024 Dodge Charger GT 2023 Dodge Charger GT
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Individual Tire Specs
Frequently Asked Questions
Yes, this swap is generally safe. The diameter difference is +0.26% (+1.9mm). This is within the safe 3% threshold and should not significantly affect your speedometer, ABS, or traction control.
Switching from 235/60R18 to 235/55R19 creates a +0.26% speedometer error. Your actual speed will be faster than displayed — at an indicated 60 mph, you'll actually be going 60.2 mph.
Switching from 235/60R18 to 235/55R19 changes ground clearance by +0.9mm. The vehicle will sit 0.9mm higher. Ground clearance change equals half the overall diameter difference.