Ergon gp3 biokork gripsthe gp3 biokork features a re engineered bar end with improved ergonomics function and a higher quality feel it also features an installation friendly clamping system patent pending as do all ergon bar end models this makes fitting extremely simple carbon bar compatible features model regular not compatible with gripshifters size small 92mm thickness large 102mm thickness material gf composite with rubber inserts bar end use mountain bike touring co