While the Escape Hybrid's AWD system is sophisticated, it relies on a precise rotational speed relationship between the front and rear axles. A significant difference in tire diameter will cause the front and rear axles to rotate at different speeds, putting stress on the differential(s), transfer case, and other drivetrain components. This can lead to:
* Transfer case damage: This is a significant risk. The transfer case is responsible for distributing power between the front and rear axles. Uneven tire diameters will cause it to work harder and potentially overheat or fail.
* Differential damage: The differentials manage the speed difference between the wheels on each axle. The differing tire sizes will exacerbate this difference, stressing the differentials, possibly leading to damage or premature wear.
* AWD system errors: The vehicle's computer system may detect the discrepancy and trigger warning lights or even limit the vehicle's functionality.
* Premature tire wear: The mismatched tire diameters will cause uneven wear on all four tires.
In short: It's best to replace all four tires at the same time, or at least replace the tires in pairs (front two, then rear two) with tires of the same size and type. Check your owner's manual for the recommended tire size. Using a different size creates a substantial risk of damage to your expensive AWD system.
