Buick Grand National Wheels and Rims

Buick Grand National Aftermarket Wheel Fitment

The Buick Grand National is the turbocharged 3.8L V6 variant of the rear wheel drive G-body Regal, built from 1982 through 1987, with the 1987 GNX as the final and highest-spec variant of the lineup. Bolt pattern across the entire G-body Regal family (base Regal, T-Type, Grand National, and the 1987 GNX) is the 5x120.65 imperial pattern, sometimes written as 5x4.75. The hub bore is 50mm, which is unusually small by modern standards and is one of the reasons aftermarket fitment on this car needs to be handled carefully. Element Wheels tracks Grand National fitment as its own catalog entry alongside the broader G-body Regal lineup because they share the same bolt pattern, hub bore, brake clearance window, and offset window. The Grand National was discontinued after the 1987 model year and the GNX is the final-year run that collectors now chase.

Find Your Buick Grand National Year

Pick your year range to see wheels and rims that fit your specific Grand National. The Grand National ran from 1982 to 1987 with the 1987 GNX as the holy grail final variant. Bolt pattern and hub bore are consistent across every production year.

The Buick Grand National Bolt Pattern

The Grand National runs the 5x120.65 bolt pattern, sometimes written in imperial form as 5x4.75. The hub bore is 50mm. Lug count is 5. Thread pitch is M12x1.5. Lug type is conical seat (lug nuts, not bolts). These specs hold across every Grand National production year (1982 through 1987) and across the rest of the G-body Regal family from 1978 forward.

A note on imperial nicknames. The 5x4.5 imperial label refers to 5x114.3 alone (114.3mm equals exactly 4.5 inches). The Grand National is neither 5x114.3 nor 5x115. It is 5x120.65, which converts to 5x4.75 inches. Force-fitting a 5x115 or 5x114.3 wheel onto a Grand National hub will put stress on the studs that eventually fails, so confirm the pattern before ordering. Compare against the rest of the Buick lineup at our Buick wheels and rims hub.

Why the Grand National Has Its Own Fitment Story

The Grand National sits on the GM G-body chassis that Buick also used for the Regal turbo, the T-Type, and (in 1987) the GNX. All of these cars share the same 5x120.65 bolt pattern, the same 50mm hub bore, and the same factory brake clearance window. What sets the Grand National apart from a base G-body Regal is the turbocharged 3.8L V6, the blackout trim, and the rear wheel drive performance heritage that still drives aftermarket wheel demand on the platform today. The 1987 GNX is the final, highest-spec variant of the lineup. Only 547 GNX cars were built and they share the same fitment box as the rest of the Grand National production run.

Two things matter most when shopping aftermarket wheels for a Grand National. The first is the 50mm hub bore, which is unusually small by modern standards. If your fitment needs rings, they'll be included with the order. The second is the brake clearance window. The factory Grand National brake setup is shorter than most modern brake packages, so brake clearance is not the constraint here. The constraint is usually inner barrel clearance to the suspension at the offsets the platform was designed around. We measure all of this directly.

How We Confirm Fitment on Buick Grand National Wheels

Element Wheels measures fitment on the platforms we sell wheels for, including the Grand National G-body. For the Grand National that means clearance from the wheel to the fender, gap between the back of the wheel and the rear axle and suspension components, brake caliper height, hub protrusion past the mounting surface, lug seat depth, and turning clearance front and rear. At our fitment facility in Chandler, Arizona, the Element Wheels team measures directly on the physical platforms we support. The 50mm hub bore on the Grand National is unusually small by modern standards and we verify hub centric ring fit specifically for this platform. We do not pull specs from manufacturer sheets the way most retailers do.

Every wheel we recommend is backed by our Fitment Guarantee. If a wheel does not fit, we pick up the wheels and refund 100 percent. No risk to you.

Buick Grand National Wheels and Rims FAQ

Get Buick Grand National Wheels Right the First Time

Pick your year above to see wheels and rims that fit. We measure across the 1982-1987 Grand National and the broader G-body Regal lineup, including the 1987 GNX, and we verify the 50mm hub bore and 5x120.65 bolt pattern directly on the platform so the wheel sits on the hub the way it is supposed to. Find your fit and start enjoying your build sooner.