XSeries-forum

[quote="Pete"]
I'd say it is one of the following:

One of the alloys is a non genuine alloy so not equal widths (LOTS of non genuine Le Mans wheels about and they are .5 inches narrower).

Part worn tyres have been put on that have once been put on the wrong rotation (I had this problem on my X5 and was a nightmare to find out what was going on).  Run your palm across the top of the tyre clockwise, it shouldn't dig in.
[/quote]There is a arrow on tyre to show direction flow

I realise that, I am pointing out that all may seem okay but previously someone might have had the tyres on the wrong way, scrubbed them and then changed them over. It happened to me and like the OP, was tricky to get to the bottom of it because all appeared okay.