How do I measure my bike stem?Updated a month ago

The length of a bike stem is not its overall physical length (from the very front to the very back). Instead, it is measured as a center-to-center distance:

The correct way to measure stem length is the distance from the central point of the steerer tube clamp to the center of the handlebar clamp.

Visual Guide for Measuring Stem Length (100mm stem as example)

The measurement should follow the centerline of the stem, connecting these two key points:

1. Start Point: The center of the bolt that secures the stem to the steerer tube (or the center of the steerer tube itself).

2. End Point: The center of the handlebar where it is clamped by the faceplate.