Found this on the XSR700 forum. Saw comparisons between the Yamaha OEM Pirelli Sportcomp (worse score for wet grip) and another version (better wear and wet grip)--go figure.
"the new EU regulation (EC/1222/2009) that begin on 1 November 2012 and defines the requirements for tire labeling concerning fuel efficiency, wet grip, and external rolling noise.
Here's more information:
https://dc602r66yb2n9.cloudfront.net...el_info_A4.pdf
"
Enjoy a other source of tire (tyre for you Brits) information a d making choices...
Matt