Is there any need to have the same tyre depth on a classic?is there any problems with having different tyre depths with the 4 wheel drive system?
Cheers

 

No,it will not make any differance as long as they are all the same size.

 

So if you have 7mm on the rear wheels and 3mm on the front that would not be good for the car?

 

No that should be fine.

 

Well I wouldn't.

Even the handbook recommends rotating tyres and swapping all four at once. I've even seen problems on here caused by using different makes front and rear, with ever-so-slightly different rolling radii.........

Your car, your choice.