How to Read a Commercial Truck Tire Size (11R22.5, 295/75R22.5)
Commercial truck tires use two sizing systems. Standard sizes like 11R22.5 read: 11 = nominal section width in inches, R = radial, 22.5 = rim diameter. Metric sizes like 295/75R22.5 read: 295 = width in millimeters, 75 = aspect ratio, 22.5 = rim diameter. 11R22.5 and 295/75R22.5 are close in overall size and are the two most common line-haul sizes in the US.
Two systems, one fleet
Standard (inch) sizing — 11R22.5:
- 11 — nominal section width in inches
- R — radial construction
- 22.5 — rim diameter in inches (tubeless low-platform)
Metric sizing — 295/75R22.5:
- 295 — section width in mm (~11.6")
- 75 — aspect ratio (sidewall = 75% of width)
- 22.5 — rim diameter in inches
The big four in Texas trucking
| Size | Rough overall diameter | Where you'll see it |
|---|---|---|
| 295/75R22.5 | ~40.5" | The dominant line-haul size — lower, slightly lighter |
| 11R22.5 | ~41.5" | The classic all-round size, regional and mixed fleets |
| 11R24.5 | ~43.6" | Owner-operators and fleets wanting max rubber |
| 285/75R24.5 | ~42.4" | Metric counterpart on 24.5 wheels |
Load ratings on commercial tires appear as load range letters (G = 14PR, H = 16PR are most common) plus a load index — verify the sidewall against your axle weights.
Position matters as much as size
The same size comes in steer, drive, and trailer-position tread designs that are not interchangeable jobs — see our guide to steer vs drive vs trailer tires. Mixed fleets running regional Texas routes usually standardize on one size across positions to simplify spares — a topic we cover in fleet tire buying for Dallas operations.
Fleet or commercial dealer? Commercial truck tires in stock in Dallas · fleet programs · wholesale quote.