Tire Ruler275/60R20 dimensions
| Overall diameter (height) | 32.99″ · 838 mm |
| Section width | 10.83″ · 275 mm |
| Sidewall height | 6.50″ · 165 mm |
| Wheel diameter | 20″ |
| Rim width (rule of thumb) | 7.5–9.5″ |
| Circumference | 103.6″ |
| Revolutions per mile | 611 |
| In inches (flotation style) | 33.0 × 10.8R20 |
How it’s calculated: the sidewall is 60% of the 275 mm width = 165.0 mm (6.50″). Add two sidewalls to the 20″ wheel: 20 + 2 × 6.50 = 32.99″.
Bigger tires than 275/60R20 on 20″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 305/55R20 | 33.2″ | +0.22″ (+0.7%) | 60.4 mph |
| 285/60R20 | 33.5″ | +0.47″ (+1.4%) | 60.9 mph |
| 265/65R20 | 33.6″ | +0.57″ (+1.7%) | 61.0 mph |
| 295/60R20 | 33.9″ | +0.94″ (+2.9%) | 61.7 mph |
| 34x11.50R20 | 34.0″ | +1.01″ (+3.1%) | 61.8 mph |
“60 mph reads” is your real speed when a speedometer set up for 275/60R20 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Sizes equivalent to 275/60R20
Within 1.5% of the same height on a 20″ wheel. Usually interchangeable for the speedometer; check width, load index and clearance.
| Size | Height | Width | Difference |
|---|---|---|---|
| 33x12.50R20 | 33.0″ | 12.5″ | +0.0% |
| 305/55R20 | 33.2″ | 12.0″ | +0.7% |
| 295/55R20 | 32.8″ | 11.6″ | −0.7% |
| 285/60R20 | 33.5″ | 11.2″ | +1.4% |
| 265/60R20 | 32.5″ | 10.4″ | −1.4% |
Same height on a different wheel size
Changing wheel size (plus or minus sizing) while keeping the overall height keeps your speedometer right:
- 33x12.50R15: 33.0″ tall on a 15″ wheel (+0.0%)
- 285/75R16: 32.8″ tall on a 16″ wheel (−0.5%)
- 285/70R17: 32.7″ tall on a 17″ wheel (−0.9%)
- 295/70R17: 33.3″ tall on a 17″ wheel (+0.8%)
- 255/80R17: 33.1″ tall on a 17″ wheel (+0.2%)
- 33x12.50R17: 33.0″ tall on a 17″ wheel (+0.0%)
- 275/70R18: 33.2″ tall on an 18″ wheel (+0.5%)
- 285/65R18: 32.6″ tall on an 18″ wheel (−1.2%)
- 265/70R18: 32.6″ tall on an 18″ wheel (−1.2%)
- 33x12.50R18: 33.0″ tall on an 18″ wheel (+0.0%)
- 305/45R22: 32.8″ tall on a 22″ wheel (−0.6%)
- 275/50R22: 32.8″ tall on a 22″ wheel (−0.5%)
- 33x12.50R22: 33.0″ tall on a 22″ wheel (+0.0%)
Popular 275/60R20 comparisons
Frequently asked questions
Is 275/60R20 a 33 inch tire?
Yes. 275/60R20 is 32.99 inches tall, so it's sold and talked about as a 33-inch tire.
What size is 275/60R20 in inches?
275/60R20 is 33.0 inches tall (overall diameter), 10.8 inches wide, with a 6.5 inch sidewall, and fits a 20 inch wheel.
What tire size is equivalent to 275/60R20?
Sizes within 1.5% of the same diameter on a 20" wheel: 33x12.50R20 (33.0"), 305/55R20 (33.2"), 295/55R20 (32.8"), 285/60R20 (33.5"). Check load index and width before swapping.
What rim width fits 275/60R20?
As a rule of thumb, about 7.5–9.5 inches. The tire maker's spec sheet lists the approved range for each model.
How many revolutions per mile does 275/60R20 make?
About 611 revolutions per mile in theory (circumference 103.6 in). Real tires turn slightly more because they flatten under load.