Tire Ruler195/65R15 dimensions
| Overall diameter (height) | 24.98″ · 635 mm |
| Section width | 7.68″ · 195 mm |
| Sidewall height | 4.99″ · 127 mm |
| Wheel diameter | 15″ |
| Rim width (rule of thumb) | 5.5–7″ |
| Circumference | 78.5″ |
| Revolutions per mile | 807 |
| In inches (flotation style) | 25.0 × 7.7R15 |
How it’s calculated: the sidewall is 65% of the 195 mm width = 126.8 mm (4.99″). Add two sidewalls to the 15″ wheel: 15 + 2 × 4.99 = 24.98″.
Bigger tires than 195/65R15 on 15″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 205/65R15 | 25.5″ | +0.51″ (+2.0%) | 61.2 mph |
| 205/70R15 | 26.3″ | +1.32″ (+5.3%) | 63.2 mph |
“60 mph reads” is your real speed when a speedometer set up for 195/65R15 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:
- 205/55R16: 24.9″ tall on a 16″ wheel (−0.4%)
- 225/45R17: 25.0″ tall on a 17″ wheel (−0.0%)
- 215/45R17: 24.6″ tall on a 17″ wheel (−1.4%)
- 235/45R17: 25.3″ tall on a 17″ wheel (+1.4%)
- 205/50R17: 25.1″ tall on a 17″ wheel (+0.4%)
- 225/40R18: 25.1″ tall on an 18″ wheel (+0.4%)
Popular 195/65R15 comparisons
Frequently asked questions
Is 195/65R15 a 25 inch tire?
Yes. 195/65R15 is 24.98 inches tall, so it's sold and talked about as a 25-inch tire.
What size is 195/65R15 in inches?
195/65R15 is 25.0 inches tall (overall diameter), 7.7 inches wide, with a 5.0 inch sidewall, and fits a 15 inch wheel.
What tire size is equivalent to 195/65R15?
No common size on a 15" wheel is within 1.5% of 195/65R15's diameter. Use the calculator above to compare any size.
What rim width fits 195/65R15?
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 195/65R15 make?
About 807 revolutions per mile in theory (circumference 78.5 in). Real tires turn slightly more because they flatten under load.