SPROCKET XTREME ALLOY/STEEL SHER/HVA/GAS/BETA SE-R/F 04-22,CR/WR/TC 98-13,EC/XC >19, RR>12 51T BK/BK

Manufactured using a high grade C45 Medium Carbon Steel outer ring and rear face with a recessed CNC machined 2024 aluminium Inner front face for weight reduction. The outer steel section of the rear sprockets have a black polished finish and the inner aluminium face has an ELOX finish in individual OEM colours.