ok so i have a 07 tc with 28K on it with stock suspension and wheels...i recently got new tires, and a vibration started...i rotated the tires to see whether the bad tire (so i thought) was on the front or rear(whether i could feel it in the steering wheel or seat)..it was too discrete, i couldnt tell a big difference....btw, this vibration starts around 65-75mph, and i drive the interstate everyday to school so im going crazy, it's enough to shake the visor and glove box door.....

ok so i went back the tire store and told them to rebalance the wheels..they did but none of the wheels were off balance by more than .5 gram....

vibration is still there...hmm...so earlier there was a post of a bad wheel barring...it that common in our cars?...

my other idea is that at school they are repaving, and there are several different height's of pavement that you must drive over..so a bent wheel is concerning me now..idk if i have one though. i dont see any noticeable flat spots, and i'm not leaking air in any of them..so could one still be bent, and me not see it visually?,, and wuold this cause that problem but still appear balanced on the machine at the tire store?..

any help greatly appreciated

--daniel

 

If a wheel was bent, it would not balance properly.

 

There is a possibility that one or more tires may be out of round. A normal balancing machine may not pick this up and still balance a wheel. Find out if the place you had them balanced has a road force balancing machine. If not, log on to www.gsp9700.com and put in yoour zip code and it will find the nearest one to you. This machine will tell you if the vibration is coming from a bent wheel or out of round tire.

 

Thanks for the help, i'll check that out asap!

 

2nd what Leo said and I'll add this:
aside from having a tire that came out of the mold w/ a flatspot, the vibration you feel could come from a tire w/ weak or bad ply. Essentially, the little fibers that give the tire its stiffness are broken or laid wrong during molding.

Had that exact problem a couple times w/ my 19" falken azenis. Only option is to replace the tire(s)