I have fixed this problem on a couple of my neighbor's carts. The first thing I would like to know "is the car frequently driven with only one person in it"? If so, more weight is on the driver's side (naturally) which allows the passenger tire to be actually sliding on the pavement a bit due to excessive toe out. (Think of it making a slight right turn all the time.) Excessive toe out is evidenced by tread wear on the inside of the tread, always the passenger side because of less weight due to one person in the cart. It's an easy fix to adjust the toe in or toe out especially with a helper to hold the other end of a tape measure. I align to nearly no toe out and see how the cart drives, but it may need a very little bit of toe out to drive better. Specs and "How To" info is readily available online.
Tire pressure is a bit of a factor too and should be properly maintained. That said, it's not the huge wear factor as a tire out of align when it should be nearly straight ahead. I fixed one that was 1/2" out of alignment. The owner couldn't believe how much farther it coasted and easier it drove.
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