PRO Tharsis Trail Stem

The integrated adjuster replaces the standard star-fangled nut with a dedicated expander system that threads directly into the stem assembly. This allows you to preload your headset bearings without needing to drive a star nut into your steerer tube, which is particularly beneficial for carbon forks.

Yes, absolutely. While the stem is specifically engineered to house a Di2 battery inside the steerer tube, it functions perfectly as a standard, high-performance stem for any mechanical drivetrain setup.

Yes, the 55mm length is a sweet spot for modern trail geometry. It provides a responsive, quick-handling feel that keeps the front end planted on technical climbs while offering enough stability for confident descending.

Titanium hardware is durable and lightweight, but it is prone to seizing if not installed correctly. We recommend using a high-quality anti-seize compound on the threads during installation and always using a torque wrench to ensure you stay within the manufacturer's specifications.

The Tharsis Trail Stem is designed for standard 1 1/8-inch steerer tubes, which covers the vast majority of modern mountain bike forks. As long as your fork has a standard steerer diameter, this stem will be compatible.