Designed for all-mountain and gravity-oriented disciplines, the Ergon GA1 Evo Grips feature a rounder, more traditional profile. The shape is subtler, than Ergon's other grips, yet they still feature a position- and hand-specific design. For function, the grips have been contoured for easy grasping. And for comfort, Ergon has padded the GA1 Evo grips with a combination of soft rubber and center gel for enhanced damping. Both attributes have been heightened with the GA1's left- and right-specific design, where each grip is contoured to fit the hand that it was designed for. For a simple setup, Ergon marks 'left' and 'right' on each grip, as well as 'up,' so that you know which way to orient the grips. The grips are locked into place via slim, lightweight aluminum clamps at the end of the bars. The Ergon GA1 Evo Grips are available in the colors Black, Blue, Green, Red, and White. Please note that they are not designed to work with twist shifters, and that any customizing of the grip will invalidate the warranty.