2021 Buick Regal TourX Wheel & Tire Sizes
Complete fitment guide for the 2021 Buick Regal TourX: factory tire sizes, compatible wheel diameters, widths and offsets, and the 5x115 bolt pattern — for every trim.
Bolt Pattern
5x115
Centre Bore
70.3 mm
Lug nuts
M12 x 1.5
Wheel Diameters
18"–22"
Factory (OEM) Tire Sizes for the 2021 Buick Regal TourX
Click any size to shop tires in stock now — free shipping anywhere in Canada, optional installation at our 5 GTA locations.
2021 Buick Regal TourX Wheel Fitment by Trim
Compatible wheel diameter, width and offset ranges for each 2021 Buick Regal TourX configuration.
2.0T · Estate, 5d
2.0L · I4 · Petrol
| Spec | Front & Rear |
|---|---|
| Wheel diameter | 18–22" |
| Wheel width | 8–9" |
| Wheel offset | 34–45 mm |
| Tire width | 235–245 mm |
2021 Buick Regal TourX Fitment FAQ
What is the bolt pattern on a 2021 Buick Regal TourX?
The 2021 Buick Regal TourX uses a 5x115 bolt pattern (5 lug nuts on a 115 mm circle) with a 70.3 mm centre bore.
What size tires fit a 2021 Buick Regal TourX?
Factory (OEM) tire sizes for the 2021 Buick Regal TourX include 235/50R18, 245/45R18, 245/40R19, 245/35R20. Always confirm against the placard inside the driver's door jamb.
What wheel sizes can I put on a 2021 Buick Regal TourX?
Depending on trim, the 2021 Buick Regal TourX accepts wheels from 18" up to 22" in diameter with the correct width and offset — larger diameters typically require lower-profile tires to keep the overall rolling diameter stock.
What lug nut size does a 2021 Buick Regal TourX use?
The 2021 Buick Regal TourX uses M12 x 1.5 lug nuts.
Fitment data is provided as a guide. Always verify sizes against your vehicle's door-jamb placard or with our fitment experts before ordering.