Not sure i wouldnt say 4 years was bad for a set of tires but i'v never owned the same car for that lenght of time, and the cars i have owned usually had the rubber transferred to the road fairly quick
Cant say i'v had that long out any tyres iv fitted

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Newest motor 2005 E53 4.4i

Previous motors, Honda civic type R , E60 530 M sport, Mitsi Evo iv with vi engine



Want it done right, Do it yourself !