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445/50R22.5 tire size
Truck and trailer tire. 445/50R22.5 is 39.2 – 39.9 inches tall in manufacturer data books, measured on 2 tire models.
What 445/50R22.5 means
445 mm nominal section width, 50 aspect ratio (sidewall height = 50% of width), R radial, for a 22.5-inch rim.
A wide-base single (“super single”): one tire replaces a pair of duals, usually 11R22.5 or 275/80R22.5 class. Lighter and less rolling resistance; no spare dual to limp home on.
Dimensions
- Overall diameter
- 39.2 in (996 mm) – 39.9 in (1,013 mm)
- Section width
- 17.7 in (450 mm)
- Static loaded radius
- 18.3 in (465 mm) – 18.6 in (472 mm)
- Revolutions per mile
- 524 – 533 (326 – 331 per km)
Range across the tire models in the Bridgestone (2017) and Apollo (2023) truck data books; tread depth and model change the numbers.
Load ranges and maximum loads
- Load range L
- 10,200 lb (4,627 kg) @ 120 psi (8.3 bar)
Maximum load per tire at the cold pressure shown. Single = 2 tires per axle end-to-end, dual = per tire in a pair.
Load & inflation table
Single, load range L: load by cold pressure
- 70 psi (4.8 bar)
- 6,570 lb (2,980 kg)
- 75 psi (5.2 bar)
- 6,940 lb (3,148 kg)
- 80 psi (5.5 bar)
- 7,310 lb (3,316 kg)
- 85 psi (5.9 bar)
- 7,680 lb (3,484 kg)
- 90 psi (6.2 bar)
- 8,030 lb (3,642 kg)
- 95 psi (6.6 bar)
- 8,390 lb (3,806 kg)
- 100 psi (6.9 bar)
- 8,740 lb (3,964 kg)
- 105 psi (7.2 bar)
- 9,090 lb (4,123 kg)
- 110 psi (7.6 bar)
- 9,370 lb (4,250 kg)
- 115 psi (7.9 bar)
- 9,780 lb (4,436 kg)
- 120 psi (8.3 bar)
- 10,200 lb (4,627 kg)
Bridgestone Truck Tire Load & Inflation Tables 2018 (TRA-based). Pressure is the minimum for the load.
Sources: Bridgestone Commercial Truck Tire Data Book v17.1, Apollo US TBR Technical Data Book 2023, Bridgestone Load & Inflation Tables 2018 v18.1. Checked October 2026. How we source data.