Hi all i have recently bought a vectra estate 07 and it has 19 inch alloy wheels on and i noticed that it has a 13 inch spare. its one of those emergency spares but surely it is ilegal to put a 13 inch wheel on with a 19 inch can anyone tell me what size spare wheel it should be if it was to be put on the front it surely cause the transmition to overheat comments please baz