vibration while driving

[bigzee]

my 1999 ez go has a vibration while driving. I rotated the tires and it became
more severe. I jaced it up but can't find the sorce. The tires seem fine, but I
think there is a rubbig noise in the rear.

[scottyb]

Since rotating the tires changed the problem I suspect one or more tires out of balance, not uncommon for cart tires. You could have them balanced, or simply try rotating the rubber 180 degrees on the rim, one by one and retest drive, until you find the one this changes?

Some wide tires may rub the leaf springs in the rear, check for rub mark on the tire... use spacers as needed, sometime a washer or 2 will do, other times you need to buy good quality billet spacers.