Check the listing for details. Wheels Manufacturing SOLO-SPLINE Micro Spline Single Speed Conversion Kit -. Condition: New. Listed at 119.37 USD. The Wheels Manufacturing SOLO-SPLINE is designed specifically for Micro Spline compatible hubs, this innovative kit is your gateway to a streamlined, high-performance single-speed system. The SOLO-SPLINE features a unique design that incorporates a base sleeve and lockring which smoothly fits onto the Micro Spline compatible freehub body. This mirrors the hassle-free installation of a standard cassette, allowing for quick setup changes. Slide on the spacers and cog, and secure them with a dependable lock ring. Experience the perfect ride, tailored to your preferences and riding style.Utilizes a durable 7075 aluminum carrier and cogs, with lightweight 6061 aluminum spacers. Includes adjustable spacers to fine-tune your chainline for optimal performance. Designed specifically.