SUB: MY12 CARBON CSU FORK CROWN O-RING FOR SID / REBA 43.825.33 HNBR-70 (2160000211)

Large o-ring that fits over the alloy collar on Rockshox SID carbon fiber CSU assemblies. This o-ring is non-essential to operation, however it does help to prolong the life of the headset bearing by preventing some debris.