I think the answer that is missing here is that they don’t stay flat. Sure they look flat to you. But they are not level and there are peaks and valleys formed over time. There is a company in Florida (I believe Kegel) that will come out the the bowling center and do a topography scan of each individual lane and provide imaging showing exactly what is going on with each lane. Then if the center chooses they can pay more money and have the lanes leveled to the best of their ability. As you can imagine the right side of the lane gets much worse than the left with all of the extra traffic.
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