SOLO-XD Single Speed Conversion Kit for XD HubsDescription Revolutionize your cycling experience with the Solo XD Single Speed Conversion Kit from Wheels Manufacturing. Designed to seamlessly transform your XD XDR hubs into a powerful single speed setup, this kit offers unrivalled simplicity and precision for a ride like no other. When SRAM introduced a new freehub body that could accommodate more gears, Wheels Manufacturing saw an opportunity to create the Solo XD. It's an adjustable kit that