The best thing i39ve ever had on a bike says tilmann waldthaler world touring cyclist endlessedge shoulder knobs have 5 sided knobs to enhance traction for acceleration braking and cornering in a range of conditions safety system puncture protection with strong tight and lightweight nylon fabric with reinforcing kevlar for resistance against pinches and cuts reflective sidewall for increased visibility duraskin sidewall reinforcement protects the casing from abrasion and cuts r