- Campagnolo 13x Retrofit Wheel Upgrade kits provide you with the required bearings so you can convert your existing Campagnolo disc brake wheels to be compatible with 13x groupsets. **Compatibility:** **Select the Cup and Cone Version (AC21-N3WRFCS) for:** * Bora WTO Disc * Bora One Disc * Shamal Ultra (Aluminium) Disc * Zonda Disc **Select the Cartridge Bearing version (AC21-N3WRFCC) for:** * Scirocco Disc wheels
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