Why does the car feel unstable after changing tires?

2 Answers
DeKennedy
07/25/25 7:22am
The main reasons for the car feeling unstable after changing tires are the use of tires with different specifications or tread patterns, or failing to perform wheel balancing after tire replacement. Below are detailed explanations of the causes of car instability after tire replacement: 1. Using tires with different specifications or inconsistent tread patterns; 2. Not performing wheel balancing after tire replacement, which causes the tire's unbalanced state to create a floating sensation during high-speed driving, hence wheel balancing is necessary after tire replacement. The primary purpose of wheel balancing is to prevent tires from bouncing up and down or swaying left and right during high-speed driving, and to avoid steering wheel vibration and body shaking issues in the vehicle.
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VonFelicity
08/10/25 6:32pm
I just changed my tires and now the car feels wobbly and unstable, which is quite unsettling. As soon as the new tires were installed, I noticed the steering wheel isn't steady, especially at high speeds where the shaking is more pronounced. The most likely cause is improper wheel balancing, where the tires' rotation is uneven due to an unbalanced center of gravity, leading to body vibrations. It could also be due to incorrect tire pressure in the new tires—too high and the tires become too stiff and unstable, too low and they don't make proper contact with the road. Sometimes, if the new tires are of a different size or tread pattern, the grip on either side may be inconsistent, causing issues. If the repair shop didn't perform a proper alignment check, misaligned suspension systems can make things worse. I recommend you drive back to the shop immediately and have them recheck the wheel balancing and tire pressure—don't wait until it becomes a bigger problem. Also, ask if all the tires are of the same type to avoid mixing old and new ones. Safety comes first; this kind of instability shouldn't be ignored. Once addressed, you can drive with peace of mind on your new tires.
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