Tire Ruler225/45R17 dimensions
| Overall diameter (height) | 24.97″ · 634 mm |
| Section width | 8.86″ · 225 mm |
| Sidewall height | 3.99″ · 101 mm |
| Wheel diameter | 17″ |
| Rim width (rule of thumb) | 6–8″ |
| Circumference | 78.5″ |
| Revolutions per mile | 808 |
| In inches (flotation style) | 25.0 × 8.9R17 |
How it’s calculated: the sidewall is 45% of the 225 mm width = 101.3 mm (3.99″). Add two sidewalls to the 17″ wheel: 17 + 2 × 3.99 = 24.97″.
Bigger tires than 225/45R17 on 17″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 235/45R17 | 25.3″ | +0.35″ (+1.4%) | 60.9 mph |
| 215/50R17 | 25.5″ | +0.49″ (+2.0%) | 61.2 mph |
| 225/50R17 | 25.9″ | +0.89″ (+3.5%) | 62.1 mph |
| 215/55R17 | 26.3″ | +1.34″ (+5.4%) | 63.2 mph |
“60 mph reads” is your real speed when a speedometer set up for 225/45R17 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Sizes equivalent to 225/45R17
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 |
|---|---|---|---|
| 205/50R17 | 25.1″ | 8.1″ | +0.4% |
| 215/45R17 | 24.6″ | 8.5″ | −1.4% |
| 235/45R17 | 25.3″ | 9.3″ | +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:
- 195/65R15: 25.0″ tall on a 15″ wheel (+0.0%)
- 205/55R16: 24.9″ tall on a 16″ wheel (−0.4%)
- 225/40R18: 25.1″ tall on an 18″ wheel (+0.5%)
Frequently asked questions
Is 225/45R17 a 25 inch tire?
Yes. 225/45R17 is 24.97 inches tall, so it's sold and talked about as a 25-inch tire.
What size is 225/45R17 in inches?
225/45R17 is 25.0 inches tall (overall diameter), 8.9 inches wide, with a 4.0 inch sidewall, and fits a 17 inch wheel.
What tire size is equivalent to 225/45R17?
Sizes within 1.5% of the same diameter on a 17" wheel: 205/50R17 (25.1"), 215/45R17 (24.6"), 235/45R17 (25.3"). Check load index and width before swapping.
What rim width fits 225/45R17?
As a rule of thumb, about 6–8 inches. The tire maker's spec sheet lists the approved range for each model.
How many revolutions per mile does 225/45R17 make?
About 808 revolutions per mile in theory (circumference 78.5 in). Real tires turn slightly more because they flatten under load.