Stem Length Calculator

Calculate the optimal stem length for your bike based on your current and desired bike fit measurements

Enter your current stem length, typically between 50-140mm

Select your current stem angle, negative values indicate downward slope

Current height relative to reference point, usually top of head tube

Target height you want to achieve

Positive for longer reach, negative for shorter reach

Stem Parameter Visualization

Technical visualization showing stem geometry and measurements.

Grid spacing: 10mm

Instructions

The Stem Calculator helps you find the optimal stem parameters. Follow these steps:

  1. Enter your current stem length and angle
  2. Set your desired height change
  3. Set your desired reach adjustment
  4. Click "Calculate" to get recommendations

Let's find your optimal stem length and angle