Zipp Service Course SL Stem

This stem is compatible with handlebars that have a 31.8 mm clamping diameter, which is the industry standard for modern road bikes. It will not fit older 25.4 mm or 26.0 mm bars.

While it is designed primarily for road cycling, the 7075 aluminum construction is robust enough for gravel use. However, keep in mind that it is optimized for stiffness and weight savings rather than vibration damping, so it may feel quite rigid on rougher terrain.

Yes, a 17-degree angle is quite aggressive compared to the more common 6-degree stems. It allows you to achieve a much lower, more aerodynamic position, which is ideal if you are looking to drop your handlebar height significantly for a race-ready setup.

Not at all. Torx-head bolts are actually preferred by mechanics because they are less prone to stripping than standard hex bolts and allow for more precise torque application. Just ensure you have a T25 Torx wrench in your toolkit before installation.

Yes, you can install the stem in either a positive or negative 17-degree orientation. This gives you the flexibility to either slam your front end for an aggressive aero position or raise your bars for a slightly more upright, comfortable fit.

Absolutely. The four-bolt removable faceplate allows you to remove or install your handlebars without having to take off your shifters, brake levers, or bar tape, making maintenance and component swaps much faster.