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Aluminium 7075 T6 Technology CT² : CERAMIC top layer impregnated with TEFLON. Adding CERAMIC ensures a harder surface, longer life, resistance to scratching and the TEFLON reduces the chain's friction coefficient by over 80% and makes for diminished noise factor, lower over all friction, less need for lubrication and optimized indexation between chainrings. These chainrings combine the following features resistance / light weight / precision / efficiency / easy to use. Bolt circle diameter (BCD) : 104mm
Aluminium 7075-T6 CT² (ceramic PTFE coated)
Number of Teeth: 44 Number of Holes: 4-Screws BCD: 104 mm