Zipp Service Course SL-OS Stem

This stem is specifically engineered for 1-1/4 inch (31.8 mm) steerer tubes. It is important to verify your fork's steerer diameter before purchasing, as this is larger than the standard 1-1/8 inch size found on many road bikes.

Yes, it is designed to fit standard 31.8 mm diameter handlebars, which covers the vast majority of modern road and gravel bars.

Using 7075 aluminum allows for a high strength-to-weight ratio, resulting in a stem that is both stiff enough for efficient power transfer during sprints and light enough to keep your front end responsive. It provides a reliable, solid feel without the harshness sometimes associated with lower-grade alloys.

This stem features a 6-degree angle. Depending on whether you mount it in a positive or negative orientation, this will provide a slight rise or drop to help you fine-tune your handlebar height.

Yes, Zipp offers a lifetime warranty on this component, which covers defects in materials and workmanship for the original owner. It is a testament to the durability Zipp builds into their Service Course line.