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Even though both our 2017 Outback and 2016 Legacy track straight, my wife reports a need to grip the wheel tightly a lot of the time, and we think the issue appears most prominently on grooved highways. The tendency for a car to follow grooves, whether designed in or random cracks, is called tramlining apparently. I am beginning to wonder if tramlining in our cars is tire related (wasn't sure, so did not go to Tire forum). Over-inflated tires cause this problem, but so do tires with stiff sidewalls and shoulders. These new-car Bridgestone Sport tires seem to fit the bill on that, or do they? Does anyone have comments on tramlining and its causes in Subarus, perhaps described as twitchy steerign? What about anyone's experiences with changing from the factory tires to ordinary non-sport tires without exceptional stiffness. There would be a less sporty feel, but perhaps less tramlining too?:nerd:
 
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