Doesn't look that wheel sticks out to much
http://s15.postimg.org/cb6l31cnr/image.jpg

As far as understand this part of tyre tread must be inside of wing and cannot stick out.

http://forum.a8parts.co.uk/attachmen...1&d=1444667566

Tyre tread is under arch, just alloy stick out a bit, but nothing extreme

alloy should be flush with the top of the wheel arch

I'm thinking that you have met a gold plated a-hole, and if your car was illegal you'd now have a ticket.
However. Just to be on the safe side. Just in case something unpleasant drops through the post in the next few weeks. It may be worthwhile collecting some evidence yourself and photograph your car, wheels, tyres, arches, everything. Close up and long shots, and from every angle. Just in case.

There's some pics of mine on page 3 of this thread. The rear spacing is legal, as the top of the wheel is inboard of the arch. The fact more of the wheel is visible lower down (and hence all the crap that gets flung up by the tyre ends up on the back bumper!) doesn't matter

http://forum.a8parts.co.uk/showthread.php?t=6865&page=3

I get no rubbing issues even when fully laden.

I'll have to check my copy of the Road Vehicles (Construction and Use) Regulatations, 1986 (as amended), which is at work, for the specific text but my understanding is that you can't have an external projection of a wheel beyond that arch line at the top. A lot depends on interpretation. If you've had any rubbing issues that have marked the tyre then they may have been picking up on that.

As above we really need pics to judge whether you're on sticky ground or not.

My view and looking at the MOT regs and the photos, you do appear to have a problem. If you look how your wheel arch tapers in from the top of the arch towards the rear bumper, this appears to be the problem. the taper is smack bang in the zone Ainar has highlighted, thus your wheel/tyre is not cover by the arch. I assume looking from the rear of the car, you can see lots of exposed tyre/wheel, which needs to covered by a wheel guard/mudflap.

Reffro - you talking to me, or the OP? Wasn't sure....

Some pics.
Rear
http://s22.postimg.org/6k1ntrfwd/IMG_0042.jpg

http://s22.postimg.org/7jrypgv25/IMG_0043.jpg

Front
http://s11.postimg.org/pm27kl2rz/IMG_0045.jpg

I need to double check when I'm back in the office - reading C&U I mentioned above I can't find any reference to it. Spray suppression only applies to HGVs in there. I would say you are borderline (on the wrong side of the border!) due to the rim sticking out past the arch on the front, so Reg 100 may apply (avoidance of danger), but need to check with a colleague if there's specific reasons to be considered legal/illegal. Are you running very low? Appears to be a lot of camber on the rear. You might get away with it in terms of wheel sticking out as the top edge is under the arch, but due to the camber a lot is sticking out at the bottom.

Of more concern is the apparent stretch to the tyre - post your wheel and tyre sizes and I can defo confirm if they are legal or too stretched. There is definitely guidance for that!

If you're running spacers I'd be tempted to go in 5mm all round just to prevent aggro.