Tire Ruler265/60R18 dimensions
| Overall diameter (height) | 30.52″ · 775 mm |
| Section width | 10.43″ · 265 mm |
| Sidewall height | 6.26″ · 159 mm |
| Wheel diameter | 18″ |
| Rim width (rule of thumb) | 7.5–9″ |
| Circumference | 95.9″ |
| Revolutions per mile | 661 |
| In inches (flotation style) | 30.5 × 10.4R18 |
How it’s calculated: the sidewall is 60% of the 265 mm width = 159.0 mm (6.26″). Add two sidewalls to the 18″ wheel: 18 + 2 × 6.26 = 30.52″.
Bigger tires than 265/60R18 on 18″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 275/60R18 | 31.0″ | +0.47″ (+1.5%) | 60.9 mph |
| 255/65R18 | 31.1″ | +0.53″ (+1.7%) | 61.0 mph |
| 265/65R18 | 31.6″ | +1.04″ (+3.4%) | 62.1 mph |
| 255/70R18 | 32.1″ | +1.54″ (+5.0%) | 63.0 mph |
| 275/65R18 | 32.1″ | +1.56″ (+5.1%) | 63.1 mph |
“60 mph reads” is your real speed when a speedometer set up for 265/60R18 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Sizes equivalent to 265/60R18
Within 1.5% of the same height on an 18″ wheel. Usually interchangeable for the speedometer; check width, load index and clearance.
| Size | Height | Width | Difference |
|---|---|---|---|
| 245/65R18 | 30.5″ | 9.6″ | +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:
- 245/75R16: 30.5″ tall on a 16″ wheel (−0.2%)
- 265/70R16: 30.6″ tall on a 16″ wheel (+0.3%)
- 215/85R16: 30.4″ tall on a 16″ wheel (−0.4%)
- 245/70R17: 30.5″ tall on a 17″ wheel (−0.1%)
- 265/65R17: 30.6″ tall on a 17″ wheel (+0.1%)
- 265/50R20: 30.4″ tall on a 20″ wheel (−0.3%)
- 275/50R20: 30.8″ tall on a 20″ wheel (+1.0%)
- 265/45R21: 30.4″ tall on a 21″ wheel (−0.4%)
- 275/45R21: 30.7″ tall on a 21″ wheel (+0.7%)
- 265/40R22: 30.3″ tall on a 22″ wheel (−0.6%)
- 285/40R22: 31.0″ tall on a 22″ wheel (+1.5%)
Popular 265/60R18 comparisons
Frequently asked questions
Is 265/60R18 a 31 inch tire?
Not quite. 265/60R18 is 30.52 inches tall, between a 30 and a 31 inch tire.
What size is 265/60R18 in inches?
265/60R18 is 30.5 inches tall (overall diameter), 10.4 inches wide, with a 6.3 inch sidewall, and fits an 18 inch wheel.
What tire size is equivalent to 265/60R18?
Sizes within 1.5% of the same diameter on an 18" wheel: 245/65R18 (30.5"). Check load index and width before swapping.
What rim width fits 265/60R18?
As a rule of thumb, about 7.5–9 inches. The tire maker's spec sheet lists the approved range for each model.
How many revolutions per mile does 265/60R18 make?
About 661 revolutions per mile in theory (circumference 95.9 in). Real tires turn slightly more because they flatten under load.