JB01 QR End Caps- Rear Sram XDQuick Release end caps for Lyne JB01 hubs. These will only work with Sram XD free hubs. How to tell what hub you have, check the non drive side bearing on the hub: 6802 (24mm OD)= Small Bearing Non Boost 6902 with rubber dust seal (28mmOD)= Large Bearing JB03 Hiper
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