Tire Ruler225/70R15 dimensions
| Overall diameter (height) | 27.40″ · 696 mm |
| Section width | 8.86″ · 225 mm |
| Sidewall height | 6.20″ · 158 mm |
| Wheel diameter | 15″ |
| Rim width (rule of thumb) | 6–8″ |
| Circumference | 86.1″ |
| Revolutions per mile | 736 |
| In inches (flotation style) | 27.4 × 8.9R15 |
How it’s calculated: the sidewall is 70% of the 225 mm width = 157.5 mm (6.20″). Add two sidewalls to the 15″ wheel: 15 + 2 × 6.20 = 27.40″.
Bigger tires than 225/70R15 on 15″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 225/75R15 | 28.3″ | +0.89″ (+3.2%) | 61.9 mph |
| 235/75R15 | 28.9″ | +1.48″ (+5.4%) | 63.2 mph |
“60 mph reads” is your real speed when a speedometer set up for 225/70R15 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Same height on a different wheel size
Changing wheel size (plus or minus sizing) while keeping the overall height keeps your speedometer right:
- 215/65R16: 27.0″ tall on a 16″ wheel (−1.5%)
- 225/60R17: 27.6″ tall on a 17″ wheel (+0.8%)
- 215/60R17: 27.2″ tall on a 17″ wheel (−0.9%)
- 235/55R17: 27.2″ tall on a 17″ wheel (−0.8%)
- 235/50R18: 27.3″ tall on an 18″ wheel (−0.5%)
- 225/55R18: 27.7″ tall on an 18″ wheel (+1.2%)
- 215/55R18: 27.3″ tall on an 18″ wheel (−0.3%)
- 245/45R19: 27.7″ tall on a 19″ wheel (+1.0%)
- 235/45R19: 27.3″ tall on a 19″ wheel (−0.3%)
Popular 225/70R15 comparisons
Frequently asked questions
Is 225/70R15 a 27 inch tire?
Not quite. 225/70R15 is 27.40 inches tall, between a 27 and a 28 inch tire.
What size is 225/70R15 in inches?
225/70R15 is 27.4 inches tall (overall diameter), 8.9 inches wide, with a 6.2 inch sidewall, and fits a 15 inch wheel.
What tire size is equivalent to 225/70R15?
No common size on a 15" wheel is within 1.5% of 225/70R15's diameter. Use the calculator above to compare any size.
What rim width fits 225/70R15?
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 225/70R15 make?
About 736 revolutions per mile in theory (circumference 86.1 in). Real tires turn slightly more because they flatten under load.