Avoid Mixing Tires (Including Winter Tires)
Every tire on an car should have the same size, type (summer, all-season, winter, all-terrain, directional), speed rating, load capacity, and construction (radial, non-radial, or run-flat). Predictable handling, effective braking, and appropriate vehicle system operation are all supported by maintaining consistent tire parameters.
Since winter tires are made to function as a whole set, this advice also applies to them. Installing winter tires on only one axle can create a traction imbalance between the front and rear of the vehicle. As mentioned, this imbalance can negatively affect handling and stability when road conditions vary.
The main exception to these rules occurs when a vehicle was initially fitted with varying tire sizes on the front and rear axles, as indicated by the manufacturer.
If Mixing Is Unavoidable
If mixing tires cannot be avoided, consider the following points:
Tires on the same axle must always be the same size. Variations in size can adversely affect vehicle balance, steering response, and braking.
Vehicles equipped with ABS, traction control, all-wheel drive (AWD), or four-wheel drive (4WD) may require tires with matching diameters at all positions. Even slight size differences can affect vehicle systems and put additional stress on driveline components.
It is not recommended to combine tires with differing speed ratings. If that should be the case, the highest speed attainable by the vehicle is capped at that of the tire with the lowest rating, potentially affecting overall handling.
New Tires vs. Worn Tires: Tread Depth Matters
To achieve optimal vehicle performance, it is advisable to replace all tires simultaneously with matching specifications. Nevertheless, if you are only replacing two:
Install the tires with deeper tread on the rear axle to help maintain stability and wet grip.
Large differences in tread depth can affect handling, consult the vehicle manufacturer if unsure.
FAQ
‎
Can You Mix Different Tires on a Vehicle?
Even if the sizes are identical, various brands or models may feature distinct tread patterns and performance attributes. It is advisable to use matching tires.
Replacing only one tire can affect handling and traction. If necessary, it should be paired with a tire that has a similar tread depth.
AWD and 4WD systems often need all tires to have the same diameter. Variations can cause extra strain on driveline components.
Winter tires are designed to work as a complete set. Mixing them with non-winter tires can negatively affect vehicle stability.
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