Do I need to replace all four tyres on my BMW if the front two are wearing?

My BMW agent say that it isn't recommended that (in my case with wearing front tyres) the front tyre pair should be replaced without the rears being replaced at the same time. The reason is that the 4WD...

Can worn tyres put enough pressure on the transfer box to crack the casing?

The transfer box on my 2013 Vauxhall Antara requires replaced as the bearing exploded and cracked open the casing. The garage have informed me that although all my tyres are well above the legal limit,...

What makes tyres go out of shape?

I run a 57 reg Volvo S40 2.4i. At 39000 miles it developed a droning/booming noise related to road speed and I suspected a worn wheel bearing. My local garage diagnosed out-of-shape rear tyres and replacement...