Buick Regal Wheel Specs

Buick Regal in 2017 stores rim diameters of 16 in, 17 in, 18 in, 19 in, and 20 in, with widths of 7 in, 7.5 in, 8 in, and 8.5 in. 19 configurations are listed below. These are catalog rows, not a single universal size.

Stored bolt patterns in 2017 are 5×120 and 5×115. Select the configuration that matches the vehicle.

Stored offset in 2017 is 40–49 mm. Offset is the distance from the rim centerline to the mounting face. A positive value places the face toward the outside of the wheel.

The year hub record is 66.9 mm (auto_model_year.center_bore_id → rim_center_bore). Trim center bore is 66.9 mm / 70.3 mm (zdonor_wheel_size_trim.center_bore). The two fields do not match, so both are shown.

Wheel rows are stored for 13 years, from 1999 through 2017. This page shows the 2017 rows. Choose another year to see that year's diameters. Years are not collapsed into one size.

Offset is how far the mounting face sits from the rim centerline, in millimeters. It is not the same number as backspacing. Backspacing on this page is calculated from rim width and offset because the rim table does not store backspacing.

Positive offset moves the mounting face toward the street side, which tucks the wheel inward relative to a zero offset. Negative offset moves the face toward the brake side, which pushes the wheel outward. The stored values on this page are the catalog offsets, not a recommendation to change them.

A different bolt pattern does not mount on 5×120 studs. An adapter is a separate part that converts one pattern to another. This page can look up adapter products after you choose a target pattern. It does not decide that an adapter is safe for this vehicle.

A hub-centric ring fills the gap when the wheel's center bore is larger than the vehicle hub. The stored vehicle hub in 2017 is 66.9 mm. A ring is not required when the bores match, and a ring cannot make a smaller wheel bore fit a larger hub.

Use the vehicle hub bore of 66.9 mm and the center bore printed on the aftermarket wheel. The ring size is the wheel bore minus the hub bore. This page does not copy the hub bore into the wheel-bore field.

Adding width grows the wheel on both sides of the centerline. The offset calculator estimates how far the inner and outer lips move. That estimate does not establish brake, suspension, or fender clearance.

Lowering the offset number moves the wheel outward. Raising it moves the wheel inward. The calculator on this page uses the standard width-and-offset geometry and labels the result as a position change, not a fitment verdict.

Confirm bolt pattern, center bore, thread, offset, and load rating on the wheel you are buying. Brake clearance, suspension clearance, and body clearance are not stored in this catalog, so a matching bolt pattern is not proof the wheel fits.

Stored widths in 2017 are 7 in, 7.5 in, 8 in, and 8.5 in. A wider wheel can be compared with the offset calculator. The catalog does not say whether a wider wheel clears the brakes or the fender.

Vehicle hub bore is the diameter of the hub that the wheel centers on, taken from the model-year rim_center_bore record. Wheel center bore is the hole in the wheel. On this page the trim center bore comes from zdonor_wheel_size_trim.center_bore. When those numbers differ, both stay visible.