[immortality]

hi all,

i changed from oem tires (potenza re RFT 050a 255/35/18) to extreme contact DW06(255/35/18, not RFT) on oem wheel 18x8.5. only rear tire changed.
front is still oem.
now, i am undergoing side-effect or something not happened before.

car starts rolling very easily ... i feel i am not safe at all... and differential does not work properly when i accelerate at curve to put on highway. i mean inner side rear break comes almost at the end of corner then suddenly outer rear breaks come(1 time on the way to work)..which makes me scarred. i did drive same as usual...
I checked tire pressure and they're all good.

I asked semipro tuner he said extreme contact DW06 is not that bad to bring
all phenomenons. Maybe it is rear or front sway bar's problem.
but i never had same issues before i changed.

reason i changed to extreme contact is tread life. oem is great but only 100
tread life but extreme has 560 at half price..

do i have to go back to oem?
can you guys advise?
please help me..
i am so dis-pressed..