New for 2014. The GS1 mountain bike grip is now available as two variants for twist shifters, with either a single, or both grips shortened. Compatible with all Gripshift models such as the SRAM XX and XX1 models, as well as Rohloff etc. The package includes an optional adaptor for increased spacing according to the users preference. This gives the rider a larger gripping position away from the gear shifter, or, without it, a more compact position. GS Grip Series 2014. Grip Compound, made in Germany. Single Twist Shift design has one short grip for the right side, and one long grip for the left side. Dual Twist Shift design has short grips for shifters on both sides of the bar.