Rider Area Distance (RAD) Calculator
Calculate your ideal RAD based on body height, or calculate the RAD of your current bike setup using stack and reach measurements.
1. Find Your Ideal RAD
Target RAD
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Based on the standard multiplier (Height / 2.25).
2. Check Current Bike RAD
Measure from Bottom Bracket center to Grid center (hypotenuse).
Current Bike RAD
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Quick Guide: Using the RAD Calculator
Here is a quick reference for calculating your fit:
1. Find Your Ideal RAD (Target Fit)
Use this to determine the RAD distance that best suits your body size.
- Action: Select your units (cm/in) and enter your Rider Height.
- Result: The calculator instantly shows your recommended Target RAD.
2. Check Current Bike RAD (Actual Fit)
Use this to measure the RAD of your existing setup for comparison.
- Action: Enter two measurements taken from your bike:
- Real Reach: Horizontal distance from the Bottom Bracket (BB) center to the Grip center.
- Real Stack: Vertical distance from the Bottom Bracket (BB) center to the Grip center.
- Result: The calculator instantly shows the Current Bike RAD (the diagonal distance).