ESI's ergonomic Fit grips are designed for a completely natural hand position on your handlebar. Our new designs balance the pressure that your hands exert onto the handlebars, increasing bar control dramatically.Fit XC and CR grips have three distinct areas: - INNER: This area is the perfect step up for your hands to rest against for maximum bar control in turns.- MIDDLE: This area is perfect for extra torque and powering while climbing.- OUTER: This thickest area is for better hand comfort, especially while descending.Each area of the Fit grip flows flawlessly into each other, creating the perfect hand placement naturally. Your hands instantly feel comfort when they grasp their unique shape, as if they were exclusively molded for your hands.The difference between Fit XC and Fit CR is that XC stands for Extra Chunky, while CR stands for Chunky, Racer's Mix. The Fit XC is the large version and the Fit CR is the small version. If you are currently running Racer's grips, go for the Fit CR!(Note: Please do not mention any part numbers or color names in the description.)