2022 Peterbilt 389 Tire Size, Pressure & Wheel Specs
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Quick answer:
- OEM tire size: 295/75R22.5 (steer), 295/75R22.5 (drive)
- Recommended cold tire pressure (door placard): 110 psi (steer), 85 psi (drive)
- Bolt pattern: 10x285.75mm
- Wheel size: 22.5" x 8.25" (steer), 22.5" x 8.25" (drive)
- Load index/speed rating: 144/141L
- Spare tire size: No standard spare
- TPMS frequency: Not equipped from factory
Tire sizes by trim
| Trim | Steer Axle | Drive Axle(s) |
|---|---|---|
| Standard | 295/75R22.5 | 295/75R22.5 |
| Optional | 315/80R22.5 | 315/80R22.5 |
Recommended replacement tires
- Michelin X Line Energy Z (steer) / X Line Energy D (drive): Premium, fuel-efficient option with long tread life.
- Bridgestone R283A Ecopia (steer) / M710 Ecopia (drive): Excellent durability and low rolling resistance for improved fuel economy.
- Goodyear Fuel Max LHD G505D (drive): A popular choice for its balance of performance, fuel efficiency, and value.
When to inflate to max load psi
On a heavy-duty truck like the Peterbilt 389, it's crucial to adjust tire pressure based on the load. The pressures listed on the door placard (110 psi front, 85 psi rear) are for a typical unladen or lightly loaded condition. When hauling heavy loads, you should inflate the tires to the maximum pressure indicated on the tire's sidewall. This ensures the tires can support the load, prevents excessive heat buildup, and maintains stability. Always refer to the manufacturer's load and inflation tables for precise pressure recommendations based on your axle weights.
Lug nut torque & pattern
- Torque: 450–500 ft-lbs
- Pattern: Tighten lug nuts in a star or crisscross pattern to ensure even clamping force.
Common tire issues for this vehicle
- Rivering/channel wear on steer tires: This can be caused by a combination of factors including improper inflation, alignment issues, and specific tread designs. Regular rotation and maintaining correct alignment are key to prevention.
- Irregular wear on drive tires: Often due to mismatched tire pressures between duals or incorrect alignment. It's critical to ensure both tires in a dual pair are at the same pressure.
Need new tires? Find a trusted shop on Repairius.
More specs for the 2022 Peterbilt 389
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2022 Peterbilt 389 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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Values can vary by engine, trim and build date; check your VIN-specific service information. Updated 2026-08-27.