I got a great deal on a set of used tires and rims for my camaro. The rims are like new and so are the tires. They are Bridgestone Potenza 245/50R16. They a W speed rated to 168 mph I think. My car is now the worst riding and driving car in town. The steering is very twichy and the car seems ton wonder all over the place. The camaro is a 98 and the rims came off a 99 Firebird so the backspacing seems right. What can I do? The max pressure for these tires is 51 pounds and Ihave them at 43 pounds now. Is that close or should I put more of less in them. Maybe I just need to but a less of a high performance tire would that help? Please help me with this Thanks>