370z MEATY TIRE THREAD

[VinceThe1]

Originally Posted by nomodsjk

I have a question and please forgive me if it's all ready been answered on this thread but I just recently got 275/35/20's in the front and 315/35/20's in the rear and ever since my traction control light won't go off. I'm not sure why this is but I'm guessing it's because of the meats. Can someone please enlighten me. Thanks in advance.

The reason more than likely is because of your tire sizes. First, your rear tire is a whopping 8% (6.6") larger in circumference than original, but that's not the problem.

The problem is that you have a 4% (3.5") difference in circumference from front and rear tires, this would throw the VDC ecu off because your front and rear axles will be turning at different speeds without any steering angle.

Your front tires will be spinning faster than your rear on the axle, making the VDC ecu think there is wheelslip (although impossible due to the fact the Z is rwd and there's no way the fronts would be spinning faster than rears unless you're locking up the rears with the e-brake but that's beside the point, it still throws off the computer)

Three different ways to solve this:

1. Turn off your VDC everytime you start your car.
2. Replace rear tires with 325/30R20
3. Replace all tires with tires that are closer to factory diameters like 275/30R20 front and 325/25R20 in the back.