| if you start to notice an uneven wear in the tread, it's best to eventually rotate tires to prolong your overall tire life.
of course, the considerations are:
if you have a staggered setup - you can only switch the two backs with each other.
if you have directional tires - you can only switch the front and back on the same side.
if you have staggered and directional - you'll need new tires sooner rather than later.
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