MIXING TIRES

It is not recommended. Different brands and models have different compounds, tread patterns, and construction, which means different grip levels and different responses to braking and cornering. If budget requires it, keep matched pairs on each axle so left and right behave identically, and put the newer pair on the rear.

No. This is one of the most dangerous mixes because the grip difference between the axles is large exactly when conditions are worst. In Quebec it is also illegal during the mandate window, since all four tires must carry the 3PMSF symbol. Fit four matching winter tires or none.

Only if your vehicle came with a staggered fitment from the factory. Otherwise no. On four-wheel drive and all-wheel drive vehicles specifically, if your owner's manual gives no mixing instructions, do not mix sizes. Differences in rolling circumference between axles can damage drivetrain components.

Because rear traction loss is far harder to recover from than front. If the rear tires let go in a corner or under braking on a wet or icy road, the vehicle can spin. If the front lets go first, it pushes wide, which is more manageable. Deeper tread on the rear preserves that margin regardless of which wheels drive the car.

Only if the replacement closely matches the other three in brand, model, size, and remaining tread depth. A single new tire alongside three worn ones creates a rolling circumference difference that affects handling and, on all-wheel drive vehicles, can damage the drivetrain. If the other three are well worn, replace in pairs or as a set.