I have a 2017 Buick Regal AWD PremII Turbo w/ 30k miles and all four original MICHELIN PRIMACY MXM4 P235/50R 18" tires. I recently had a flat tire on the front pass side tire but only replaced the front two tires (not all four) w/ new, same size, non-Mich tires. You recently said that all four tires need to be replaced in this situation if you have an AWD vehicle. Are you referring to a 4WD that needs to be manually changed or an AWD that changes to all 4WD when road conditions change when slippage is detected? Do I need to buy two more replacement tires? Please elaborate, thanks.
Still love my Regal!
AWD that changes to all 4WD when road conditions change when slippage is detected?
AWD cars (like yours).
With permanently-engaged AWD if all four tires are not within a fraction of an inch of the same diameter it can cause excess wear in the drivetrain.
