The MTB Racer. Considering todays extreme XC-tracks challenges the Racing Ralph has been reworked completely. As a result there is a very fast & versatile XC-profile especially developed for the rear wheel. There are many gripping edges in the Profiles middle section for super traktion und exzellent acceleration. Parallel it shows extraordinary rolling properties & is extremly soft. The Tubeless Easy version with ADDIX Speed (red) means velocity stability & durability. Works perfectly on the rear wheel in combination with Rocket Ron. Tread design: low tread depth in the central tread for high speed & low weight. ADDIX Speed (red) or ADDIX Speedgrip (blue).