I bought Continental Contact Extreme's 215/50/17 a month ago and have already had them balanced 4 times. Every time they balance them they feel great and then the next day the wheel is shaking again. I've been told that these tires cannot be properly balanced on the stock rim ..... three tire guys couldn't find anything worng with the tires .... so don't suggest that the tires are bad. I'm all out of ideas and am thinking about going back to stock.
Thanks!

 

love the avatar! Sorry about the tires

 

Funny you keep trying to unload these tires on me.. No wonder.. And yet "they're in perfect condition." .... Good thing I wasn't interested.

 

Do the tires just do it when you first drive the car in the morning? Some tires get a bit of a flat spot after sitting for a while. Usually goes away when the tires are warmed up. See if it goes away after a few miles on the highway.

 

I know what you mean about the flat spot ..... its not that ... the flat spot shaking goes away after the first two miles or so but then I feel vibration/shaking at higher speeds 60-80MPH

 

I had a simliar issue with another set of tires in the past. Turned out they were very sensitive to tire pressure. I had them set too high, & when they heated up after the balance, it through it off. Too low & the same thing happend. Took several tries to get it right. Same speeds 60 to 80MPH. Since your using the stock size, rim fitment should have no bearing. The tire specs out perfect for the stock rims:
215/50WR17 90W SL 400 AA A
1323lbs.
44psi
10/32nds
6-7.5"
7"
8.9"
NA
25.5"
818
Could also try the special GSP9700 wheel balancer from Hunter.
http://www.hunter.com/pub/product/balancer/index2.htm
You can search for a shop that uses it by you.

 

Were you the guy who wanted ONLY 2 of my OEM tires that I had for sale in the Blackmarket?.. you are not running 2 different types of tires on the car... are you?... just wondering..

Smitty