ARC Boost Hub 4 Bearings MTB Hub 6 Pawls 3 Teeth 15x110 12x148 for Micro Spline 12S Shimano 8-12S Sram XD 12S Bicycle BIke Hub. Freehub body : For Shimano 11 Speed /For Shimano MS 12 Speed / XDR 12 Speed.
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