|
I have the answer for you as I currently do have MPSS on my car currently and I also have had experience with wider wheels/tires with lower offsets on others cars (s2000/rsx-s).
First of all the MPSS are ultra high performance tires, so they do need to get some heat into them. I had an incident similar to yours where I took a corner pretty hard when the tires were cold and the rear lost traction instantly in 50-60 degree weather (traction control helped me in this situation or I would have spun). This was on stock 215 sized MPSS tires. However, when temps are higher and you have gotten the MPSS tires warmed up, they grip very very well. In your case, you have 245 width tires, which will take longer to heat up plus you were in cold weather, which contributed to your lack of grip. The stock tires that come in our cars do not need much heat in them to grip.
As for the wheels, you are using wider and lower offset wheels compared to stock. The lower offset will effectively make your car feel softer and more floaty especially on stock suspension. Only way to fix this is to either get a wheel with an offset that is closer to stock (+48 offset), or get stiffer springs/sway bars. The reason for a softer feel is that a lower offset means you're effectively increasing the lever arm, which alters how your suspension responds to the road. That also changes ideal spring/dampening rates.
So there you have it, the statements above is why your car is handling this way.In my honest opinion, the car handles great from the factory and the 215 tires give it enough grip. When you alter wheel width and offset without modifying other aspects of the suspension, you may actually be making it worse.
|