Tire Ruler235/45R17 dimensions
| Overall diameter (height) | 25.33″ · 643 mm |
| Section width | 9.25″ · 235 mm |
| Sidewall height | 4.16″ · 106 mm |
| Wheel diameter | 17″ |
| Rim width (rule of thumb) | 6.5–8″ |
| Circumference | 79.6″ |
| Revolutions per mile | 796 |
| In inches (flotation style) | 25.3 × 9.3R17 |
How it’s calculated: the sidewall is 45% of the 235 mm width = 105.8 mm (4.16″). Add two sidewalls to the 17″ wheel: 17 + 2 × 4.16 = 25.33″.
Bigger tires than 235/45R17 on 17″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 225/50R17 | 25.9″ | +0.53″ (+2.1%) | 61.3 mph |
| 215/55R17 | 26.3″ | +0.98″ (+3.9%) | 62.3 mph |
| 225/55R17 | 26.7″ | +1.42″ (+5.6%) | 63.4 mph |
“60 mph reads” is your real speed when a speedometer set up for 235/45R17 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Sizes equivalent to 235/45R17
Within 1.5% of the same height on a 17″ wheel. Usually interchangeable for the speedometer; check width, load index and clearance.
| Size | Height | Width | Difference |
|---|---|---|---|
| 215/50R17 | 25.5″ | 8.5″ | +0.5% |
| 205/50R17 | 25.1″ | 8.1″ | −1.0% |
| 225/45R17 | 25.0″ | 8.9″ | −1.4% |
Same height on a different wheel size
Changing wheel size (plus or minus sizing) while keeping the overall height keeps your speedometer right:
- 205/65R15: 25.5″ tall on a 15″ wheel (+0.7%)
- 195/65R15: 25.0″ tall on a 15″ wheel (−1.4%)
- 205/60R16: 25.7″ tall on a 16″ wheel (+1.4%)
- 225/40R18: 25.1″ tall on an 18″ wheel (−0.9%)
Frequently asked questions
Is 235/45R17 a 25 inch tire?
Not quite. 235/45R17 is 25.33 inches tall, between a 25 and a 26 inch tire.
What size is 235/45R17 in inches?
235/45R17 is 25.3 inches tall (overall diameter), 9.3 inches wide, with a 4.2 inch sidewall, and fits a 17 inch wheel.
What tire size is equivalent to 235/45R17?
Sizes within 1.5% of the same diameter on a 17" wheel: 215/50R17 (25.5"), 205/50R17 (25.1"), 225/45R17 (25.0"). Check load index and width before swapping.
What rim width fits 235/45R17?
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 235/45R17 make?
About 796 revolutions per mile in theory (circumference 79.6 in). Real tires turn slightly more because they flatten under load.