Tire Ruler205/70R15 dimensions
| Overall diameter (height) | 26.30″ · 668 mm |
| Section width | 8.07″ · 205 mm |
| Sidewall height | 5.65″ · 144 mm |
| Wheel diameter | 15″ |
| Rim width (rule of thumb) | 5.5–7″ |
| Circumference | 82.6″ |
| Revolutions per mile | 767 |
| In inches (flotation style) | 26.3 × 8.1R15 |
How it’s calculated: the sidewall is 70% of the 205 mm width = 143.5 mm (5.65″). Add two sidewalls to the 15″ wheel: 15 + 2 × 5.65 = 26.30″.
Bigger tires than 205/70R15 on 15″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 215/70R15 | 26.9″ | +0.55″ (+2.1%) | 61.3 mph |
| 225/70R15 | 27.4″ | +1.10″ (+4.2%) | 62.5 mph |
“60 mph reads” is your real speed when a speedometer set up for 205/70R15 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:
- 225/60R16: 26.6″ tall on a 16″ wheel (+1.3%)
- 215/60R16: 26.2″ tall on a 16″ wheel (−0.5%)
- 215/55R17: 26.3″ tall on a 17″ wheel (+0.0%)
- 245/45R18: 26.7″ tall on an 18″ wheel (+1.5%)
- 225/45R18: 26.0″ tall on an 18″ wheel (−1.2%)
- 235/45R18: 26.3″ tall on an 18″ wheel (+0.1%)
Popular 205/70R15 comparisons
Frequently asked questions
Is 205/70R15 a 26 inch tire?
Not quite. 205/70R15 is 26.30 inches tall, between a 26 and a 27 inch tire.
What size is 205/70R15 in inches?
205/70R15 is 26.3 inches tall (overall diameter), 8.1 inches wide, with a 5.6 inch sidewall, and fits a 15 inch wheel.
What tire size is equivalent to 205/70R15?
No common size on a 15" wheel is within 1.5% of 205/70R15's diameter. Use the calculator above to compare any size.
What rim width fits 205/70R15?
As a rule of thumb, about 5.5–7 inches. The tire maker's spec sheet lists the approved range for each model.
How many revolutions per mile does 205/70R15 make?
About 767 revolutions per mile in theory (circumference 82.6 in). Real tires turn slightly more because they flatten under load.