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The Zipp Aluminium Vorbau Service Course SL OS 2021 is a premium stem designed for riders who demand a precise, confident cockpit feel on road, gravel, and cyclocross bikes. Built from high-quality aluminum, it offers an excellent balance of stiffness, strength, and low weight, making it ideal for performance-focused cyclists who want reliable control without unnecessary bulk. Its oversized (OS) clamp diameter is engineered to work seamlessly with modern handlebars, improving steering precision and overall ride stability, whether you are sprinting out of the saddle or descending at high speed.
With its refined shape and clean finish, the Service Course SL stem is equally at home on a race bike or a high-end endurance build. The secure faceplate design helps distribute clamping forces evenly, protecting lightweight bars while ensuring a creak-free interface. Multiple length options are typically available, allowing riders to fine-tune reach and fit for optimal comfort and efficiency. If you are upgrading your cockpit or completing a new build, this Zipp stem delivers the professional-level performance, durability, and sleek aesthetics that serious cyclists expect.
