FRENES

Pontiac Trans Am PCD

1982–1992
VERIFIED
⌀70.3
PCD5x120.65
Centre bore70.3 mm
Offset (ET)ET55
Fixing typeEcrous - 12x1.50
Hub centric rings 70.3 mm → Wheel spacers 5x120.65(partner link) Change PCD (PCD adapter)(partner link) Sheet for your mechanic

Fitting wheels on a Pontiac Trans Am

A Pontiac Trans Am (1982–1992) uses a 5x120.65 PCD and a centre bore of 70.3 mm. Any wheel must match the vehicle's PCD exactly: there is no tolerance, unless you use a PCD adapter.

  • PCD: 5x120.65 required. See all vehicles with 5x120.65.
  • Centre bore: the wheel must have a centre bore of 70.3 mm or more. If it is larger (as with most aftermarket wheels), add a hub centric ring wheel centre bore → 70.3 mm.
  • Offset: the original is ET55. Compare your future wheel with the offset calculator (your vehicle is already selected) to see how many millimetres further in or out it will sit.
  • Fixings: thread Ecrous - 12x1.50. The nuts or bolts must have the same seat (conical, spherical or flat) as the wheel.

All recorded versions (2)

The original specs vary with the year, trim or wheel size. Identify your version from the tyre size marked on the sidewall.

VersionPCDCentre boreWheelOffsetTyre
Version 1 5x120.65 70.3 mm — — —
Version 2 5x120.65 70.3 mm — ET55 —

Vehicles with the same PCD and centre bore

Same 5x120.65 PCD and same 70.3 mm centre bore: wheels from these vehicles bolt on and centre on a Pontiac Trans Am without rings. Offset, width, diameter and caliper clearance still need checking.

Pontiac Firebird 1982–1992 Pontiac Phoenix 1977–1979 Pontiac Catalina 1971–1976 Pontiac Grand Am 1964–1980 Pontiac GTO 1964–1974 Pontiac Tempest 1964–1986 Chevrolet Corvette C7 2013–2019 Chevrolet Corvette C6 2004–2013 Cadillac XLR 2003–2009 Chevrolet Jimny from 1998 Chevrolet Corvette C5 1997–2004 Chevrolet Blazer 2WD 1986–2004 Chevrolet Blazer 4WD 1986–2004 Chevrolet Corvette C4 1984–1996 Chevrolet S10 1982–1993 Buick Apollo 1977–1985

Will wheels from another vehicle fit your Trans Am?

Choose the vehicle the wheels come from: we compare the hub, then each original wheel to the millimetre.

Frequently asked questions

What is the PCD of a Pontiac Trans Am?

A Pontiac Trans Am (1982–1992) has a PCD of 5x120.65: 5 studs or bolts spaced around a circle 120.65 mm in diameter.

Does a Pontiac Trans Am need a hub centric ring?

The centre bore (hub diameter) of a Pontiac Trans Am is 70.3 mm. A wheel with a larger centre bore is fitted with a hub centric ring that brings it down to the hub diameter. A wheel with a smaller centre bore cannot be fitted.

What offset (ET) for a Pontiac Trans Am?

The recorded original offset is ET55 depending on the version and wheel size. A lower ET pushes the wheel outwards, a higher ET pulls it inwards: check wheel well and caliper clearance before making any change.

Which vehicles have the same PCD as a Pontiac Trans Am?

With the same PCD (5x120.65) and the same centre bore (70.3 mm), these include: Pontiac Firebird, Pontiac Phoenix, Pontiac Catalina, Pontiac Grand Am. Offset, width and rim diameter still need checking for each vehicle.

Does a value look wrong, or is a version missing? Let us know, we check every report.