2017 Isuzu NQR — Tire Size & Pressure

Quick Answer

• OEM Tire Size: 215/75R17.5
• Recommended Cold Tire Pressure (Front/Rear): Varies by specific NQR configuration and load. Always refer to the tire placard located on the driver's side door jamb for your vehicle's specific recommended pressures. Typically, pressures can range from 80-100 psi.
• Bolt Pattern: 6x222.25mm
• Wheel Size: 17.5 x 6.00
• Load Index/Speed Rating: Varies depending on tire manufacturer and specific tire, but generally 126/124L or higher is common for this class of truck.
• Spare Tire Size: 215/75R17.5 (Full-size)
• TPMS Frequency: Isuzu NQR models of this era typically do not come equipped with TPMS from the factory as it's not mandated for vehicles over 10,000 lbs GVWR. If an aftermarket system is installed, consult its specifications.

Tire Sizes by Trim

The 2017 Isuzu NQR typically came with one standard tire size across its various configurations, focusing on commercial-grade durability and load-carrying capacity.

Recommended Replacement Tires

When replacing tires on your 2017 Isuzu NQR, prioritize commercial-grade tires designed for light and medium-duty truck applications. These tires are built to handle heavier loads, offer increased durability, and provide good mileage for commercial use.

• Bridgestone M760 Ecopia: A premium commercial highway tire known for its fuel efficiency and long tread life. Excellent for regional and line haul applications. (Price Tier: Premium)
• Michelin XZE2: A highly regarded all-position radial tire designed for exceptional mileage, durability, and retreadability. A workhorse for commercial use. (Price Tier: Premium)
• Goodyear G622 RSD: A robust drive tire optimized for regional and urban applications, offering good traction in varying conditions and resistance to scrubbing. (Price Tier: Mid-Range to Premium)
• Hankook AH11: An all-position radial tire offering a good balance of performance and value, suitable for various commercial applications. (Price Tier: Mid-Range)

When to Inflate to Max Load PSI

For heavy-duty trucks like the Isuzu NQR, the "max load PSI" (often indicated on the tire's sidewall) is the pressure required to carry the maximum weight rating of that specific tire. However, you should not always inflate to this maximum pressure. Instead, always refer to the vehicle's tire placard on the driver's side door jamb for the recommended cold tire inflation pressures for your specific vehicle and anticipated load.

Only inflate to the maximum load PSI if your vehicle is consistently operating at or near its maximum Gross Vehicle Weight Rating (GVWR) or Gross Axle Weight Rating (GAWR), and only if those pressures do not exceed the vehicle manufacturer's recommended maximums. Over-inflation can lead to a harsher ride, premature tire wear in the center of the tread, and reduced traction. Under-inflation can cause excessive heat buildup, leading to tire failure, poor fuel economy, and irregular wear on the outer edges.

Lug Nut Torque & Pattern

Lug Nut Torque: For the 2017 Isuzu NQR, the lug nut torque specification is typically in the range of 180-220 ft-lbs (244-298 Nm). Always consult your vehicle's owner's manual or a certified Isuzu service manual for the precise specification. Using a properly calibrated torque wrench is crucial for ensuring correct wheel retention and preventing issues like wheel-off situations or damaged studs.

Lug Nut Tightening Pattern: A star or criss-cross pattern should always be used when tightening lug nuts. This ensures even seating of the wheel against the hub and prevents uneven stress on the wheel studs. Tighten the nuts in several stages until the final torque specification is reached.

Common Tire Issues for this Vehicle

Owners of commercial trucks like the Isuzu NQR often encounter specific tire issues due to the demanding nature of their work:

• Uneven Wear: Often caused by improper tire pressure (under or over-inflation), worn suspension components, or misalignment. Regular inspections and proper maintenance are key.
• Damage from Road Hazards: Potholes, curbs, and construction debris are common culprits for punctures, sidewall damage, and impact breaks, especially in urban environments.
• Rapid Wear (Steering Axle): The steering axle tires can experience faster wear due to constant turning and scrubbing, particularly in urban delivery cycles. Proper alignment and tire rotation are vital.
• Shoulder Wear (Drive Axle): Drive tires can exhibit shoulder wear if underinflated or if the vehicle frequently operates with heavy loads on uneven surfaces.
• Heat Buildup: Under-inflation is the primary cause of excessive heat buildup in commercial truck tires, which can lead to catastrophic tire failure. Maintaining correct pressure is paramount for safety and tire longevity.

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