If you’re swapping tires, checking clearance, or considering a lift, knowing the exact height of a 265/70R17 tire is the first step. The height — also called overall diameter — comes to roughly 31.6 inches, though the precise number shifts slightly depending on the brand, tread design, and inflation pressure. Here’s what the numbers mean and what actually matters for your truck or SUV.
What Does 265/70R17 Mean?
The code on the sidewall breaks down into four pieces of information. Pirelli’s size guide spells out the meaning: 265 is the section width in millimeters, 70 is the aspect ratio (sidewall height as a percentage of width), R stands for radial construction, and 17 is the wheel diameter in inches.
So the sidewall height is 70% of 265 mm, which works out to 185.5 mm — about 7.30 inches. Add two sidewalls (top and bottom) to the 17-inch rim and you get the full height.
| Dimension | Inches | Millimeters |
|---|---|---|
| Overall Diameter (Height) | 31.61 in | 802.8 mm |
| Section Width | 10.43 in | 265 mm |
| Sidewall Height | 7.30 in | 185.5 mm |
| Rim Diameter | 17 in | 431.8 mm |
| Circumference | 99.31 in | 2522.1 mm |
| Revolutions per Mile | 638 | — |
In high-flotation sizing, this tire is roughly equivalent to a 31.6×10.4R17. That’s the size system used for larger off-road tires, where the first number is overall diameter in inches.
Does 31.6 Inches Hold Up Across Brands?
The short answer: mostly, but not perfectly. Tire height is a calculated figure based on nominal dimensions, and manufacturers build to slightly different tolerances. You’ll see some 265/70R17 tires listed anywhere from 31.6 to 31.7 inches in diameter depending on the model and how the tread is designed.
If you’re working with tight clearance — like a leveling kit or near a suspension component — measure the actual mounted tire rather than relying on the math alone.
Rim Width Range and Fitment Considerations
The tire’s width relative to the wheel affects handling, wear patterns, and how the sidewall sits.
Size alone doesn’t guarantee safe fitment. Four checks matter more than any single dimension:
- Wheel diameter: must match the 17-inch rim size.
- Wheel width: must fall within the approved range above.
- Vehicle clearance: verify the tire doesn’t rub at full steering lock or suspension compression.
- Load rating: confirm the tire’s load index covers your vehicle’s weight.
If you need a heavier-duty option, our tested roundup of the best 265/70R17 10-ply tires covers load ratings, tread life, and real-world performance for trucks that work for a living.
FAQs
Are 265/70R17 tires the same as 31-inch tires?
Close, but not identical.
Will 265/70R17 tires fit without a lift?
On many trucks and SUVs designed for this size, yes — it’s a common factory and replacement size for vehicles like the Toyota Tacoma, Ford Ranger, and Jeep Wrangler. But fitment depends on your specific model, trim, and suspension. Check clearance at full lock and full compression before committing, since aftermarket wheels can change the offset enough to cause rubbing.
How much taller is a 265/70R17 than a 265/65R17?
That’s a meaningful difference when it comes to gearing, speedometer accuracy, and suspension clearance, so the two sizes are not directly interchangeable without checking fitment.
References & Sources
- Pirelli. 265/70 R17 Tire Size Catalog Confirms the metric size code meaning: 265 mm width, 70 aspect ratio, radial, 17-inch wheel.
- Michelin USA. Tires by Dimension: 265/70/17 Official brand reference confirming the size family and available models.
- TireSize.com. 265/70R17 Tire Size Calculator Provides the calculated diameter, width, sidewall, circumference, and revolutions per mile figures.