hi everyone! nearly mot time and noticed that the rear tyres on my xr3i are nearly bald after only 3 or 4 months on the car?? my car is pretty low probably about 50mm and sits on standard rs turbo alloys.

the wear is mostly from the middle tread to the outside of the tyre.
the tyres i baught were called barum tyres and were 35 quid each??

has anyone any ideas as to why they are wearing so fast?
i had to replace one of the tie bars on the back as it snapped but only on one side!

any help is much appreciated!! thanks!!