Plump Leather Grips are made from O rings that we manufacture from the extra leather won from cutting the tops for our leather saddles. These rings are stacked and held together by 3 spokes to form a grip. These come in size 130mm in length, but are also delivered with spare 100mm spokes to make them shorter for use with grip shifters. The diameter is 22.2mm. To change, unscrew the bolts to make the ends come off and pull out the 3 spokes. Take off enough O rings to make it shorter and put together using the 100mm spokes.