Pirelli Angel GT - tread direction

[wemorgan]

I've just had some Pirelli Angel GT tyres fitted. Can anyone please explain why the front tyres are fitted with the tread pattern in the opposite direction to the rear tyres?
Cheers.

[wemorgan]

Interesting.

I thought tread was more for water dispersion.
Also, why are RWD cars not fitted with similar opposing tread directions?

I've sent an email to Pirelli. We'll see what they come back with.