I've always been one of those people who could detect a miniscule amount of incorrect wheel balance. Having taken the trim rings off and put them back on several times over the last few weeks I have come to the conclusion that the tire balance is better with them off. I have new Comfortred tires, and with the trim rings on it rides great, but with them off, it rides absolutely smooth as glass. I know this is subjective, but I can tell a difference. Even though this is a very subjective suggestion, it does make some logical sense. I've always watched the screens at Discount tire when they balance my tires, because on the SUV I used to own (oversize A/T tires) even the slightest variance from "0" on their machine would give me a ride quality I could detect as inferior, even at slow speeds. Tires that are even slightly out of balance will not take imperfections in the road the same way as perfectly balanced ones do. Some of the weights they use to balance tires are pretty small. It seems logical to me that adding the weight of a plastic trim ring could possibly alter the tire balance ever so slightly. If we assume for a minute that at least in my case, the tires are balanced better without the trim rings, then why? I could have one or any number of the trim rings that are "out of round" or not perfectly weighted from one side to the other. I'm not sure if the cutout for the valve stems would account for enough weight to alter the balance with any significance. Another possibility is that at speed the trim rings can warp slightly due to centrifugal force. Of course, if the trim rings are not perfectly weighted all the way around, that would worsen the effect. Someone I know will tell me I'm crazy, and they're probably right. However, I would swear the car just feels smoother... almost lighter... with them off. :behindsofa: I'm sure for safety and insurance reasons, you could not get a tire balancer to balance the tires with the trim rings on, but it seems like a logical thing to do. Since they're only rings, you should be able to leave them on. Has anyone had their tire shop not notice that the trim rings come off an just balance the tires with the rings on???