High-volume casing and fast-rolling tread design provide exemplary performance in most riding conditions. MSPD – MaxxSpeed is the latest version of Maxxis’ race compound that utilizes a silica filler to improve speed wet traction as well as further reducing rolling resistance by 25%. EXO equipped models feature Maxxis` EXO sidewall protection which helps prevent puncture from sidewall abrasions. TR - Tubeless Ready - sealant required