Bumpy ride
 

Where can i get my golf cart tires shaved? they are nylon and are rough riding i think they may be out of round.

If you have a bumpy ride it is true the Nylon tires are the cause, however if someone who still shaves tires took the amount that would need to be removed to make a difference would almost destroy the integrity of the tire.
I suggest finding out the one or two tires causing the problem and replace with new.
When we build carts now we offer the best tires that are radials like your car, they never bounce.