Campagnolo record 11 speed chainthe engine of the 11 speed drivetrain is the chain it has been designed to eliminate all friction with the sprockets adjacent to those in operationa special treatment ensures smoothness we have reduced the width of the chain to 55 millimetres with the new spacing and a new material has been envisaged for the outer links the pins are hollow inside to reduce the weight while maintaining strength it is necessary to use tool ut cn300 to fit it the ni ptfe treat