Shimano Dura-Ace CS-R9100 11-Speed Cassette Lockring ModelNumber=J3004 Color Black Ring Position/Type Chain

Color Black Ring Position/Type Chain Retaining Single Ring Tooth Count 40 Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Chainring BCD 110 Shimano Asymmetric Material Aluminum Defined Color Black

16-degree flare

9 degrees of backsweep is easier on the wrists than most traditional bends of handlebar and 5 degrees of upsweep offers comfort at all angles

Polymer matrix platform allows for efficient reduction in neck forces

Elastomer spring suspension for shock absorption

Shimano Dura-Ace CS-R9100 11-Speed Cassette Lockring ModelNumber=J3004 Color Black Ring Position/Type ChainShimano Dura Ace CS R9100 11 Speed Cassette Lockring. Shimano Cassette Lock Rings