Tire Ruler34x11.50R20 dimensions
| Overall diameter (height) | 34.00″ · 864 mm |
| Section width | 11.50″ · 292 mm |
| Sidewall height | 7.00″ · 178 mm |
| Wheel diameter | 20″ |
| Rim width (rule of thumb) | 8–10″ |
| Circumference | 106.8″ |
| Revolutions per mile | 593 |
34x11.50R20 is a flotation size: the first number is the height (34″), the second the width (11.5″) and the last the wheel (20″). The sidewall is (34 − 20) ÷ 2 = 7.00″. In metric terms it’s close to a 290/60R20.
Bigger tires than 34x11.50R20 on 20″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 285/65R20 | 34.6″ | +0.59″ (+1.7%) | 61.0 mph |
| 35x12.50R20 | 35.0″ | +1.00″ (+2.9%) | 61.8 mph |
| 35x13.50R20 | 35.0″ | +1.00″ (+2.9%) | 61.8 mph |
| 295/65R20 | 35.1″ | +1.10″ (+3.2%) | 61.9 mph |
| 325/60R20 | 35.4″ | +1.35″ (+4.0%) | 62.4 mph |
“60 mph reads” is your real speed when a speedometer set up for 34x11.50R20 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Sizes equivalent to 34x11.50R20
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 |
|---|---|---|---|
| 295/60R20 | 33.9″ | 11.6″ | −0.2% |
| 275/65R20 | 34.1″ | 10.8″ | +0.2% |
| 265/65R20 | 33.6″ | 10.4″ | −1.3% |
Same height on a different wheel size
Changing wheel size (plus or minus sizing) while keeping the overall height keeps your speedometer right:
- 315/70R17: 34.4″ tall on a 17″ wheel (+1.1%)
- 285/75R17: 33.8″ tall on a 17″ wheel (−0.5%)
- 34x10.50R17: 34.0″ tall on a 17″ wheel (±0.0%)
- 295/70R18: 34.3″ tall on an 18″ wheel (+0.8%)
Popular 34x11.50R20 comparisons
Frequently asked questions
Is 34x11.50R20 a 34 inch tire?
Yes. 34x11.50R20 is 34.00 inches tall, so it's sold and talked about as a 34-inch tire.
What size is 34x11.50R20 in inches?
34x11.50R20 is 34.0 inches tall (overall diameter), 11.5 inches wide, with a 7.0 inch sidewall, and fits a 20 inch wheel.
What tire size is equivalent to 34x11.50R20?
Sizes within 1.5% of the same diameter on a 20" wheel: 295/60R20 (33.9"), 275/65R20 (34.1"), 265/65R20 (33.6"). Check load index and width before swapping.
What rim width fits 34x11.50R20?
As a rule of thumb, about 8–10 inches. The tire maker's spec sheet lists the approved range for each model.
How many revolutions per mile does 34x11.50R20 make?
About 593 revolutions per mile in theory (circumference 106.8 in). Real tires turn slightly more because they flatten under load.