50% recycled grips are ideal for any bike with front and/or rear Gripshift or other twist shift style rear shifters. Features and an innovative mid grip expanding bolt mounting system that leaves an open end for bar ends and mirrors. Designed to fit any standard straight bicycle handlebar with an outer diameter between 20-22mm. Ergonomic shape provides instant comfort. Includes 3mm hex for installation and replaceable end plugs. Available for dual shifting and single shifting bikes