Ok, its slight, I had to really look but I can see every two or three blocks is darker with no "line". I will get the fitter to check them for damage and get them onto the front. Need to watch the pennies!

Even the dealer said to rotate the tyres when I complained about the noise.

Hoping the yoko's doesn't suffer as badly

Got 4 452s fitted yesterday, noticed the pressure warning went off just before home today, the tyres all look ok so reset it, I gather its due to a change of tyre and the wheels being on differant axles?

The new tyres will have a greater circumference than the old worn tyres.

That's what I was thinking but I only ever reset the warning once when I first got the car, must be due to the sudden change, it was when i went from 20 to 40. They seem much smoother and refind so far.