Recently, wide tires and short chain stays have become widespread. This trend has one problem: sprockets with 27-28 teeth may simply not fit in a frame with chainstays shorter than 12.7″. At the same time, there is not enough  speed  with 25 teeth sprocket. Therefore, we made a sprocket with 26 teeth. It is  fits in any frame, and at the same time it will give you significantly more speed than a sprocket with 25 teeth.