900144 R1WURKS (B7 Series) Ultra Lightweight Rear CVA Axle, Titanium. 990063-1 R1WURKS CVA Barrel, Titanium. Replaces: HD CVA Bones, 71mm #92549. Two CVA bones. 71mm length bones are needed when using the 81mm Rear Arm and -4mm Rear Hub options.
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