2016 Peterbilt 389 Tire Size, Pressure & Wheel Specs

Welcome to the comprehensive tire and wheel specification guide for the 2016 Peterbilt 389. As an ASE-certified master technician, I know that maintaining a Class 8 heavy-duty commercial truck requires strict adherence to OEM specifications. Whether you are running long hauls on the interstate or tackling heavy transport, the correct tire size, load rating, and tire pressure are critical for safety, fuel economy, and tire longevity.

Quick Answer: 2016 Peterbilt 389 Tire & Wheel Specs

Because the Peterbilt 389 is a highly customizable commercial truck, exact configurations vary based on the original chassis order (e.g., day cab vs. sleeper, axle weight ratings). Below are the standard specifications:

• OEM Tire Size: 11R22.5, 11R24.5, 295/75R22.5 (Low Pro), or 285/75R24.5. Wide-base singles (445/50R22.5) are also optional.
• Recommended Cold Tire Pressure (Front/Steer): 105–110 PSI (check the door jamb placard/B-pillar for exact axle weight rating requirements).
• Recommended Cold Tire Pressure (Rear/Drive): 100–105 PSI.
• Bolt Pattern: 10-lug hub-piloted, 10x285.75 mm.
• Wheel Size: 22.5" x 8.25" or 24.5" x 8.25" (Alcoa or Accuride aluminum/steel).
• Load Index / Speed Rating: 144/142 (Load Range G, 14-ply) or 146/143 (Load Range H, 16-ply). Speed ratings are typically L (75 mph) or M (81 mph).
• Spare Tire Size: Commercial semi-trucks generally do not carry a traditional spare tire.
• TPMS Frequency: 433 MHz (commercial aftermarket systems like Bendix SmarTire often utilize this frequency).

Tire Sizes by Application

In the Class 8 world, tire selection is dictated by application rather than "trim levels." Here are the most common configurations for the 2016 Peterbilt 389:

Recommended Replacement Tires

When replacing commercial tires on a Peterbilt 389, it is vital to select application-specific tread patterns (steer vs. drive). Here are top trusted options across different price tiers:

• Premium Tier (Steer): Michelin X Line Energy Z – Exceptional fuel efficiency, even wear, and long tread life. Excellent for highway hauling.
• Premium Tier (Drive): Bridgestone M713 Ecopia – High-mileage drive tire offering outstanding traction and reduced rolling resistance.
• Mid-Range Tier (All-Position): Yokohama 104ZR – A great balance of durability, payload capacity, and cost-effectiveness.
• Economy Tier (Drive): Sailun S768E – A budget-friendly closed-shoulder drive tire that still provides respectable mileage for regional haulers.

When to Inflate to Max Load PSI

As a heavy-duty Class 8 truck, the 2016 Peterbilt 389 operates under strict Gross Vehicle Weight Ratings (GVWR) and Gross Axle Weight Ratings (GAWR).

You should inflate your tires to the maximum cold pressure listed on the tire sidewall (typically 110 to 120 PSI for Load Range H) only when your steer or drive axles are loaded to their absolute maximum legal capacity. Under normal loads, you should follow the specific load-to-inflation tables provided by the tire manufacturer (e.g., Michelin or Bridgestone commercial data books) or the Peterbilt door placard. Overinflating a lightly loaded truck leads to a harsh ride, premature center tread wear, and reduced braking traction. Underinflating a heavy load causes catastrophic heat buildup and blowouts.

Lug Nut Torque & Pattern

Proper wheel torque is arguably the most critical safety item on a Class 8 truck.

• Bolt Pattern: 10x285.75 mm (Hub-piloted).
• Torque Spec: 450–500 ft-lbs.
• Procedure: Tighten in a star (crisscross) pattern using a calibrated 1-inch drive torque wrench. Never rely solely on a pneumatic impact gun. Retorque the lug nuts after 50 to 100 miles of driving following a wheel installation.

Common Tire Issues for this Vehicle

1. Steer Tire Cupping/River Wear: The 389 is a long-nose conventional truck. Worn kingpins, loose tie-rod ends, or improper toe alignment will quickly cause erratic wear (cupping or river wear) on the steer tires.
2. Drive Tire Heel/Toe Wear: Often caused by mismatched tire diameters in dual assemblies or aggressive braking habits. Always measure duals to ensure they are within 1/4-inch in circumference of one another.
3. Tire Belt Separations: Usually the result of running tires underinflated for the hauled load, causing extreme sidewall flexing and heat accumulation.

Need new tires? Find a trusted shop on Repairius.