Complete Tire Diameter Reference Chart
Scroll through our complete reference table to find the exact overall outer diameter for any common tire size.
Quick Answer
For common 17-inch wheel fitments, overall diameter varies drastically by vehicle type. A compact car's 215/45R17 tire measures only 24.6 inches, while an off-road truck's 315/70R17 stands nearly 10 inches taller at 34.4 inches — nearly the height of a bicycle wheel.
Heights for Popular SUV and Truck Sizes (17" to 20" Rims)
| Tire Size Code | Overall Diameter (in) | Section Width (in) | Typical Fitment |
|---|---|---|---|
| 225/65R17 | 28.5" | 8.9" | Compact Crossovers (RAV4, CR-V) |
| 245/75R16 | 30.5" | 9.6" | Base Model Mid-Size Trucks |
| 265/70R17 | 31.6" | 10.4" | Standard Half-Ton Pickups |
| 275/55R20 | 31.9" | 10.8" | Premium SUV / Truck Upgrades |
| 285/70R17 | 32.7" | 11.2" | Off-Road / Rubicon Models |
| 35x12.50R20 | 35.0" | 12.5" | Lifted Custom Trucks |
How Diameters Are Calculated
Overall Diameter = (2 × Sidewall Height) + Rim Diameter | Sidewall = (Width mm × Aspect%) / 25.4
- Mathematical standard — diameters derived from exact ISO formulas
- Real-world variance = ±0.2 inches depending on brand and tread block design
- 35x12.50 inch sizes are already in imperial — no conversion needed
- Tread wear reduces diameter by up to 1 inch over the tire's service life