Zis4me--
I also have the base 18s and suffered from this problem originally..
Not only did the car feel wobbly at higher speeds, but I felt unstable braking at higher speeds as well.
I ended up purchasing new Pirelli P Zeros in the front. Jumped up to a 235/50. Helped fill out the wheel well more. I also added 275/45s in the back. The widest tires possible.
After buying the bigger tires, turning at high speeds is no longer scary, I can no longer spin out the tires in second gear, wobble is gone, and the tires stick to the road.
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2009 Brilliant Silver BASE 7AT | TEIN S-Tech Springs | K&N Drop Ins & z1 Maf Tubes | AAM S-Line Short Tails | 5% Tint | 20MM Spacers | Sport Spoiler NickTurnon's 370z Build
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