The racer. Given the extreme challenges of today's XC tracks, we have completely remastered Racing Ralph. The result is a very fast and versatile XC profile, specially developed for the rear wheel. Tread design: many grip edges in the tread center for super traction and excellent acceleration. At the same time excellent unrolling properties and extremely quiet. Tubeless Easy Version: with ADDIX Speed (Red) for speed, stability and durability. Note: Please always check the correct tyre size using the ETRTO designation in the technical data. The customs designation may or historically several different tyre sizes.