2016 Isuzu NPR — Tire Size, Pressure, Bolt Pattern & Wheel Specs

Quick answer

• OEM tire size: LT215/85R16 (most NPR and NPR‑HD; load range E or F depending on GVWR). Some fleets use LT225/75R16E as an alternate fit on the OE 16x6 wheel.
• Recommended cold tire pressure (door placard): Typically 80 psi front / 80 psi rear with LT215/85R16 Load Range E. NPR‑HD with Load Range F commonly lists around 90–95 psi front / 90–95 psi rear. Always follow your door placard.
• Bolt pattern: 6x205 mm (6‑lug medium‑duty hub‑centric)
• Wheel size and offset: 16x6.0 steel; deep positive offset/inset typical of dual‑rear‑wheel applications (generally +120 to +135 mm). Hub bore is large (≈150 mm) and hub‑centric.
• Load index / speed rating (typical):
  • LR E: 115/112 Q (single/dual)
  • LR F: 120/116 Q (single/dual) Actual index depends on tire brand and placard requirement.
• Spare tire size: Full‑size 16x6 steel spare, same size as OE steer/drive (usually LT215/85R16)
• TPMS frequency: Many 2016 NPR trucks were not factory‑equipped with TPMS. If sensors are present, verify before ordering; common frequencies in the U.S. market are 315 MHz or 433 MHz.

Tire sizes by trim

Notes:

• Exact ratings and pressures vary by VIN/GVWR, body upfit, and tire load range. Always defer to the driver’s door/seat base placard and tire sidewall.

Recommended replacement tires

Here are proven choices in the common LT215/85R16 and LT225/75R16 fitments. Select the load range (E or F) that matches your placard.

• Premium (durability/ride):
  • Michelin Agilis CrossClimate (LT215/85R16E or LT225/75R16E) — excellent wet/snow grip and long tread life.
  • Bridgestone Duravis R238 (LT215/85R16, E/F availability varies) — commercial all‑position tread, robust casing.
• Mid‑range (value/performance):
  • Firestone Transforce HT2 or AT2 (LT215/85R16E, LT225/75R16E) — fleet‑friendly, widely available.
  • Hankook Dynapro HT RH12 (LT215/85R16E) — stable highway manners, good wear.
• Budget/fleet:
  • Cooper Discoverer HT3 (LT215/85R16E) — solid all‑season highway choice.
  • General Grabber HD (select sizes) or similar commercial all‑season where available.
• Winter service (where required):
  • Bridgestone Blizzak LT (LT215/85R16E, select markets) — severe‑snow traction for steer and drive positions.

Tip: For NPR‑HD requiring Load Range F, confirm availability in LT215/85R16F through a commercial tire dealer; many models above have F‑range counterparts or commercial equivalents.

When to inflate to max load psi (HD trucks only)

On Load Range F (or higher) tires, use the tire’s max cold psi only when the truck is at or near its gross axle weight rating (GAWR) or running sustained highway speeds in hot weather at heavy load. If you operate well below GVWR, use the door‑placard pressures or weight‑based inflation tables from the tire maker to maintain ride, traction, and even wear. Never exceed the lesser of the wheel rating, tire sidewall max, or placard.

Lug nut torque & pattern

• Lug pattern: 6‑lug hub‑centric. Tighten in a star/alternating sequence.
• Torque: Medium‑duty 6‑lug NPR wheels typically spec high torque. If the exact spec is unavailable, a safe industry range is 150–220 lb‑ft; verify for your VIN and wheel type. Re‑torque after 50–100 miles on new installations.
• Hardware: Use the correct flange nuts for the OE steel wheels; inspect studs and nuts for corrosion or galling before torquing.

Common tire issues for this vehicle

• Inner dual wear/heat from under‑inflation: Dual rears are unforgiving; set both rear tires to the same cold psi and check frequently.
• Steer tire shoulder wear: Often caused by low pressure or misalignment from curb strikes. Align after suspension or steering work and rotate on schedule.
• Cupping/heel‑toe on steers: Worn shocks or irregular rotations accelerate chop; inspect shocks around 50–60k miles.
• Valve/extension leaks on duals: Periodically soap‑test valve stems and extension hardware.
• Load range mismatch: Replacing with a lower load range than the placard (e.g., E instead of required F) can overload tires; always match or exceed placard load range and index.
• Sidewall and bead damage: Tight delivery routes and curbing are common; inspect inside dual sidewalls during every service.

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