if you rotate and balance your auto tires in a timely manner and they still wear uneven and feather or cup why

Question

when tires have been rotated and balanced in a timely manner and your tires begin to cup and wear on outside unevenly-what is the problem

Answer 1

Out side wear indicate you may have an alignment problem. Cupping could be caused by weak shock absorbers. Also may depend on how you define timely?

Answer 2

There are a lot of variables that can contribute to uneven wear. Car make, pressure, alignment, type of tire, shock/strut wear are just to name a few. Assuming the most obvious is OK ie alignment, type of tire and car make are not the cause, I will try to help. The biggest reason we see here in our shop is underinflation. People will argue, manufacturers will argue, tire companies will argue over what is correct pressure. If you read the inside door panel, you should find a tire data sheet. It will give you the stock tire size and inflation pressure recommendation. Let's say it says 28psi on the decal. Now go and read on your tire; it will have a max weight and pressure label. Most of the time, these two numbers don't match or are even close. If you have a passenger car or light truck, it probably says 39 or 44psi. Who's right?? Well at my shop we go somewhere in between, let's say 40 psi on a 44 psi tire or maybe 36psi on a 39 psi tire. If you are wearing on the outside shoulders more than the middle, it's probably an inflation issue. Now for the feathering issue, it may be caused by worn struts or an alignment issue. You list wear terms ie feather, cup, eneven and all terms mean different things. Each has it's own unique problems so to say one problem is causing them all is almost impossible. I hope this helps....MIKE

Answer 3

I would ask the shop that is balancing and rotating your tires this question. Obviously the problem(s) with the tires, wheels, alignment, steering, suspension or tire pressure has not been solved. Rotating and balancing regularly are a good idea. However at present you are merely spreading abnormal tire wear among all your tires, not solving the actual cause.

Answer 4

i belive it is a combo. of things shocks, inflation, alignment and brakes. you want to see the uneven wear all the way across the tire. if you look FWD cars scallop on the rear RWD do it on the front. i think this is because brakes vibrate even though you don't feel them i feel the drive axles don't alow this vibration due to the pressure of the drive line. also the tread patteren has alot to do with the prob. the more OPEN the patteren the worse the prob. when i buy tires i try to get a solid thread on the out side and inside all the way around the tire. also if you have custom wheels you need to stay on top of the ballance like every 5 to 7k because youu will not get as true of a ballance.

Answer 5

it has to do with alignment it can be toe in of out caster or camber that is top and bottom lean. or air pressure take it to a alignment shop to see if it is on and some tires are defective if it is stock tire the car came with that can be problems to.

Answer 6

the car needs aligned, get it aligned and keep up with the tire pressure every couple of weeks.

Answer 7

Bad wheel barring!