TreadCompass

Isuzu I-Mark Lug Nut Torque

The 1985–1990 Isuzu I-Mark lug nut torque is 85 ft-lbs (115 N·m).

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Isuzu I-Mark · 1985–1990

Lug nut torque
85ft-lbs115 N·m
Same spec for every year 1985–1990.
  • ✓ Tighten in a star pattern, in two passes, with a torque wrench (not an impact gun)
  • ✓ Re-check the torque after the first 50–100 miles
  • ✓ Confirm against your owner’s manual; aftermarket wheels can differ

Source: TreadCompass vehicle fitment database. Page updated November 2026. Specs can vary with aftermarket wheels and lug hardware, so always confirm with your owner’s manual.

Factory tire sizes for the Isuzu I-Mark

Compare prices across retailers for your size.

175/70R131985–1990 · Compare prices →185/60R141987–1990 · Compare prices →

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Isuzu I-Mark lug nut torque FAQ

What is the lug nut torque for a Isuzu I-Mark?

The 1985–1990 Isuzu I-Mark lug nut torque is 85 ft-lbs (115 N·m). Tighten in a star pattern with a torque wrench, then re-check after the first 50–100 miles.

Do all I-Mark trims use the same lug nut torque?

Yes. Every I-Mark trim in our database uses the same lug nut torque for a given model year.

Has the Isuzu I-Mark lug nut torque changed over the years?

No. It has been 85 ft-lbs (115 N·m) for every model year we have, 1985–1990.

What size tires come on the Isuzu I-Mark?

Factory tire sizes include 175/70R13 (1985–1990) and 185/60R14 (1987–1990). Check the sidewall of your current tires to confirm yours, then compare prices for that size above.

New to torquing wheels? See how to torque lug nuts and common questions.