The perfect racing profile compound and carcass in the third generation of the schwalbe racing ralph evo pacestar liteskin folding 29er mountain bike tyre everything about it is designed for speed in this 29er version the special arrangement of the blocks and their elongation have been adapted to the longer footprint performance advantages of the large wheels are optimally improved schwalbe have used pacestar triple compound which was designed for xc racing with a firm rubber base medium