"Not Very PC" posted this link to Metzler tires. Lots of good info in it, check it out.

http://www.us.metzelermoto.com/media/metzeler_vtwin_07_lo.pdf
(http://www.hdtalking.com/ext.php?ref=http://www.us.metzelermoto.com/media/metzeler_vtwin_07_lo.pdf)