Tire Ruler235/55R19 dimensions
| Overall diameter (height) | 29.18″ · 741 mm |
| Section width | 9.25″ · 235 mm |
| Sidewall height | 5.09″ · 129 mm |
| Wheel diameter | 19″ |
| Rim width (rule of thumb) | 6.5–8″ |
| Circumference | 91.7″ |
| Revolutions per mile | 691 |
| In inches (flotation style) | 29.2 × 9.3R19 |
How it’s calculated: the sidewall is 55% of the 235 mm width = 129.3 mm (5.09″). Add two sidewalls to the 19″ wheel: 19 + 2 × 5.09 = 29.18″.
Bigger tires than 235/55R19 on 19″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 245/55R19 | 29.6″ | +0.43″ (+1.5%) | 60.9 mph |
| 255/55R19 | 30.0″ | +0.87″ (+3.0%) | 61.8 mph |
| 255/60R19 | 31.0″ | +1.87″ (+6.4%) | 63.8 mph |
“60 mph reads” is your real speed when a speedometer set up for 235/55R19 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Sizes equivalent to 235/55R19
Within 1.5% of the same height on a 19″ wheel. Usually interchangeable for the speedometer; check width, load index and clearance.
| Size | Height | Width | Difference |
|---|---|---|---|
| 255/50R19 | 29.0″ | 10.0″ | −0.5% |
| 245/55R19 | 29.6″ | 9.6″ | +1.5% |
Same height on a different wheel size
Changing wheel size (plus or minus sizing) while keeping the overall height keeps your speedometer right:
- 235/75R15: 28.9″ tall on a 15″ wheel (−1.0%)
- 225/75R16: 29.3″ tall on a 16″ wheel (+0.4%)
- 245/70R16: 29.5″ tall on a 16″ wheel (+1.1%)
- 235/70R16: 29.0″ tall on a 16″ wheel (−0.8%)
- 245/65R17: 29.5″ tall on a 17″ wheel (+1.2%)
- 235/65R17: 29.0″ tall on a 17″ wheel (−0.5%)
- 245/60R18: 29.6″ tall on an 18″ wheel (+1.4%)
- 235/60R18: 29.1″ tall on an 18″ wheel (−0.3%)
- 255/55R18: 29.0″ tall on an 18″ wheel (−0.5%)
- 255/45R20: 29.0″ tall on a 20″ wheel (−0.5%)
- 265/45R20: 29.4″ tall on a 20″ wheel (+0.7%)
Frequently asked questions
Is 235/55R19 a 29 inch tire?
Yes. 235/55R19 is 29.18 inches tall, so it's sold and talked about as a 29-inch tire.
What size is 235/55R19 in inches?
235/55R19 is 29.2 inches tall (overall diameter), 9.3 inches wide, with a 5.1 inch sidewall, and fits a 19 inch wheel.
What tire size is equivalent to 235/55R19?
Sizes within 1.5% of the same diameter on a 19" wheel: 255/50R19 (29.0"), 245/55R19 (29.6"). Check load index and width before swapping.
What rim width fits 235/55R19?
As a rule of thumb, about 6.5–8 inches. The tire maker's spec sheet lists the approved range for each model.
How many revolutions per mile does 235/55R19 make?
About 691 revolutions per mile in theory (circumference 91.7 in). Real tires turn slightly more because they flatten under load.