Promax Adjustable Quill Stem

This stem is designed for 1-inch threaded forks, which are standard on many vintage road bikes. However, you should verify that your fork has a 22.2mm inner diameter steerer tube before purchasing to ensure a proper fit.

This stem is compatible with 25.4mm handlebar clamp diameters. If your current handlebars are a modern oversized standard, such as 31.8mm, they will not fit this stem without a shim or a different handlebar.

The 0-50 degree range allows you to significantly raise or lower your handlebar height without changing the stem itself. It is ideal for switching between an aggressive, aerodynamic riding position and a more upright, comfortable posture for city cruising.

The dual-bolt faceplate provides a reliable, secure clamp for casual trail riding and city commuting. While it is durable, it is best suited for general riding rather than aggressive downhill or heavy-impact mountain biking.

Yes, the stem includes the necessary bolts for both the faceplate and the quill wedge mechanism. You will only need basic hex keys to install and adjust the angle.