Tire Ruler235/55R17 dimensions
| Overall diameter (height) | 27.18″ · 690 mm |
| Section width | 9.25″ · 235 mm |
| Sidewall height | 5.09″ · 129 mm |
| Wheel diameter | 17″ |
| Rim width (rule of thumb) | 6.5–8″ |
| Circumference | 85.4″ |
| Revolutions per mile | 742 |
| In inches (flotation style) | 27.2 × 9.3R17 |
How it’s calculated: the sidewall is 55% of the 235 mm width = 129.3 mm (5.09″). Add two sidewalls to the 17″ wheel: 17 + 2 × 5.09 = 27.18″.
Bigger tires than 235/55R17 on 17″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 225/60R17 | 27.6″ | +0.45″ (+1.7%) | 61.0 mph |
| 235/60R17 | 28.1″ | +0.93″ (+3.4%) | 62.0 mph |
| 225/65R17 | 28.5″ | +1.34″ (+4.9%) | 63.0 mph |
| 235/65R17 | 29.0″ | +1.85″ (+6.8%) | 64.1 mph |
“60 mph reads” is your real speed when a speedometer set up for 235/55R17 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Sizes equivalent to 235/55R17
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 |
|---|---|---|---|
| 215/60R17 | 27.2″ | 8.5″ | −0.1% |
Same height on a different wheel size
Changing wheel size (plus or minus sizing) while keeping the overall height keeps your speedometer right:
- 215/70R15: 26.9″ tall on a 15″ wheel (−1.2%)
- 225/70R15: 27.4″ tall on a 15″ wheel (+0.8%)
- 215/65R16: 27.0″ tall on a 16″ wheel (−0.6%)
- 235/50R18: 27.3″ tall on an 18″ wheel (+0.3%)
- 215/55R18: 27.3″ tall on an 18″ wheel (+0.5%)
- 225/45R19: 27.0″ tall on a 19″ wheel (−0.8%)
- 235/45R19: 27.3″ tall on a 19″ wheel (+0.6%)
Frequently asked questions
Is 235/55R17 a 27 inch tire?
Yes. 235/55R17 is 27.18 inches tall, so it's sold and talked about as a 27-inch tire.
What size is 235/55R17 in inches?
235/55R17 is 27.2 inches tall (overall diameter), 9.3 inches wide, with a 5.1 inch sidewall, and fits a 17 inch wheel.
What tire size is equivalent to 235/55R17?
Sizes within 1.5% of the same diameter on a 17" wheel: 215/60R17 (27.2"). Check load index and width before swapping.
What rim width fits 235/55R17?
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 235/55R17 make?
About 742 revolutions per mile in theory (circumference 85.4 in). Real tires turn slightly more because they flatten under load.