Warning eps groupsets will not work with 1129 ratio cassettes if you are using a 29t cassette please use 12t up gear ratiomaximum performance and low noise with no compromise on components campy tech lab engineers designed super record sprockets with double frame on the last two sprocket tripletsthe more solid lighter frame uses titanium for the 6 larger sprocketsthe ultra shift teeth design has been upgraded to make shifting faster with perfect synchronization and to eliminate chain s