Tire Ruler235/45R19 dimensions
| Overall diameter (height) | 27.33″ · 694 mm |
| Section width | 9.25″ · 235 mm |
| Sidewall height | 4.16″ · 106 mm |
| Wheel diameter | 19″ |
| Rim width (rule of thumb) | 6.5–8″ |
| Circumference | 85.8″ |
| Revolutions per mile | 738 |
| In inches (flotation style) | 27.3 × 9.3R19 |
How it’s calculated: the sidewall is 45% of the 235 mm width = 105.8 mm (4.16″). Add two sidewalls to the 19″ wheel: 19 + 2 × 4.16 = 27.33″.
Bigger tires than 235/45R19 on 19″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 245/45R19 | 27.7″ | +0.35″ (+1.3%) | 60.8 mph |
| 255/50R19 | 29.0″ | +1.71″ (+6.3%) | 63.8 mph |
| 235/55R19 | 29.2″ | +1.85″ (+6.8%) | 64.1 mph |
“60 mph reads” is your real speed when a speedometer set up for 235/45R19 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Sizes equivalent to 235/45R19
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 |
|---|---|---|---|
| 245/45R19 | 27.7″ | 9.6″ | +1.3% |
| 225/45R19 | 27.0″ | 8.9″ | −1.3% |
Same height on a different wheel size
Changing wheel size (plus or minus sizing) while keeping the overall height keeps your speedometer right:
- 225/70R15: 27.4″ tall on a 15″ wheel (+0.3%)
- 215/65R16: 27.0″ tall on a 16″ wheel (−1.2%)
- 225/60R17: 27.6″ tall on a 17″ wheel (+1.1%)
- 215/60R17: 27.2″ tall on a 17″ wheel (−0.6%)
- 235/55R17: 27.2″ tall on a 17″ wheel (−0.5%)
- 235/50R18: 27.3″ tall on an 18″ wheel (−0.3%)
- 215/55R18: 27.3″ tall on an 18″ wheel (−0.1%)
Frequently asked questions
Is 235/45R19 a 27 inch tire?
Not quite. 235/45R19 is 27.33 inches tall, between a 27 and a 28 inch tire.
What size is 235/45R19 in inches?
235/45R19 is 27.3 inches tall (overall diameter), 9.3 inches wide, with a 4.2 inch sidewall, and fits a 19 inch wheel.
What tire size is equivalent to 235/45R19?
Sizes within 1.5% of the same diameter on a 19" wheel: 245/45R19 (27.7"), 225/45R19 (27.0"). Check load index and width before swapping.
What rim width fits 235/45R19?
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 235/45R19 make?
About 738 revolutions per mile in theory (circumference 85.8 in). Real tires turn slightly more because they flatten under load.