Hi I noted elsewhere that you fitted the AD09 to your GT4. I have done the same which replaced the A052 as was wanting a better wear rate. On the Nurburgring circuit they are now making an awful noise under compression which I expect is hitting the wheel arch liner. Did you have to raise the suspension on yours for track use? I have normally 245 on front and 295 on rear, AD09 are 255 and 295. Assume noise is coming from the front. Will remove tyres and go back to AO52 If I can't resolve but would appreciate any thoughts and experience you have. Many thanks
