Fast rolling midsection with ramp like, siped knobs that smoothly transition into the shoulder for predictable response and stable and grippy shoulder knobs for high support in off-camber se STRL - Super Trail, 3 carcass layers under the tread with 2 on the sidewalls, bead to bead Snake Skin material and APEX sidewall chafer for increased puncture protection and stabilization SPDGRP - SpeedGrip - Addix SpeedGrip compound is Schwalbe`s all around performace upgrade compound well versed on all terrain and conditions Tire Bead: TBLS - Fold Tread/SW: Bk/Bsk