You need a tire that keeps your legs on their game for hours on end, provides tenacious grip in the corners, allows you to drop your buddies off the start, while remaining composed when leaned over through the first turn.
H2Pro Frame Bags fit snugly under or over the top tube and are designed for easy one handed access either to heavier gear that helps keep the bike's center of gravity low or to more frequently accessed items such as a cell phone or a nutrition bar.