Just put a pair of these on the back of my 03Z. 275s...they feel a bit heavy and the car feels loose when cornering at high speeds. Previously I ran Nitto Invo 275s until they were basically slicks.

My question...am I imagining that they feel heavier? The Nittos were very light given the size and I felt gave MUCH more cornering ability here in the Austin hill country. When I try to accelerate through a corner at anything above 80MPH, the car feels very loose in the back and there is a bit too much oversteer. I have Ecsta 245s on the front and they have been great for the price. I just noticed it when I put the new shoes on last night.

Does this make sense or is it possible that with 50K on the car that the suspension is getting loose and I might need to get new shocks and springs?