Tire Ruler205/65R15 dimensions
| Overall diameter (height) | 25.49″ · 648 mm |
| Section width | 8.07″ · 205 mm |
| Sidewall height | 5.25″ · 133 mm |
| Wheel diameter | 15″ |
| Rim width (rule of thumb) | 5.5–7″ |
| Circumference | 80.1″ |
| Revolutions per mile | 791 |
| In inches (flotation style) | 25.5 × 8.1R15 |
How it’s calculated: the sidewall is 65% of the 205 mm width = 133.3 mm (5.25″). Add two sidewalls to the 15″ wheel: 15 + 2 × 5.25 = 25.49″.
Bigger tires than 205/65R15 on 15″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 205/70R15 | 26.3″ | +0.81″ (+3.2%) | 61.9 mph |
| 215/70R15 | 26.9″ | +1.36″ (+5.3%) | 63.2 mph |
“60 mph reads” is your real speed when a speedometer set up for 205/65R15 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:
- 205/60R16: 25.7″ tall on a 16″ wheel (+0.8%)
- 225/50R17: 25.9″ tall on a 17″ wheel (+1.4%)
- 235/45R17: 25.3″ tall on a 17″ wheel (−0.6%)
- 215/50R17: 25.5″ tall on a 17″ wheel (−0.1%)
- 245/40R18: 25.7″ tall on an 18″ wheel (+0.9%)
Popular 205/65R15 comparisons
Frequently asked questions
Is 205/65R15 a 25 inch tire?
Not quite. 205/65R15 is 25.49 inches tall, between a 25 and a 26 inch tire.
What size is 205/65R15 in inches?
205/65R15 is 25.5 inches tall (overall diameter), 8.1 inches wide, with a 5.2 inch sidewall, and fits a 15 inch wheel.
What tire size is equivalent to 205/65R15?
No common size on a 15" wheel is within 1.5% of 205/65R15's diameter. Use the calculator above to compare any size.
What rim width fits 205/65R15?
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 205/65R15 make?
About 791 revolutions per mile in theory (circumference 80.1 in). Real tires turn slightly more because they flatten under load.