I have the same problem. I replace my Hankooks on the back - I run 305's - but didn't replace the fronts. I thought I had about 10K left on the fronts, which are also Hankooks - 275's. The car is jerking all over the place. I DID NOT have this problem with the V12's at all until I changed the rears and didn't replace the fronts. I am going to install new V12's on the front this Saturday and I am sure that will fix the issue. I looked very closely at the fronts the other day and they are pretty worn. I guess I should have ponied up the $$$ for all four when I replaced the rears.
I now that many think the Hankooks suck, but I really like them, especially for the money. I don't track my car, but I do hit the mountain twisties often and they have always performed fine for me, until this latest issue, which I am sure is my doing.
AZ
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AZ Roadster
'09 Base|Chicane Yellow|TSW Nurburgrings|Stillen CBE|Eclipse AVN726E In Dash DVD/NAV|Clear Bra|H&R Spacers 15/20|Hankook Ventus V-12's 275/35 & 305/30
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