The gp series is a perfect solution for common wrist pain during cycling. In particular the gp4 offers up an ergonomic approach to wrist pain relief with its pure rubber compound and numerous options for hand positions. Further benefits of this grip are the easy to install clamping mechanism and approved back friendly ergonomics. Not approved for carbon handlebars.in order to help you maintain perfect control over your bike your hands should not completely envelop the grip which is why ergon offers many grips in two size diameters ndash small and large. The difference refers to the grip width hand size meaning a larger hand will have a more positive fit on a thicker grip while a smaller hand is better fit to a smaller grip. For hand glove sizes 6.5 to 8.5 grip width is 92mm not inc bar end we recommend small for 8.5 to 10.5 large grip width is 102mm not inc bar end usually is better.