Reach Formula:
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Definition: This calculator estimates the ideal reach measurement for a mountain bike based on the bike's base reach, rider height, and a height factor.
Purpose: It helps cyclists and bike fitters determine the optimal reach measurement for comfortable and efficient riding position.
The calculator uses the formula:
Where:
Explanation: The base reach is adjusted based on the rider's height multiplied by a factor that accounts for typical body proportions.
Details: Proper reach ensures comfortable riding position, optimal power transfer, and better bike handling. Incorrect reach can lead to discomfort, fatigue, and reduced control.
Tips: Enter the bike's base reach (usually found in geometry charts), height factor (default 0.3), and your height in millimeters. All values must be ≥ 0.
Q1: What is base reach?
A: Base reach is the horizontal distance from the bottom bracket to the top of the head tube, measured parallel to the ground.
Q2: Why is the default height factor 0.3?
A: 0.3 is a common factor that works well for most mountain bike riders, based on average body proportions.
Q3: When would I change the height factor?
A: Adjust if you have unusually long or short arms (increase for long arms, decrease for short arms).
Q4: How do I measure my height in mm?
A: Measure your height in centimeters and multiply by 10, or measure in inches and multiply by 25.4.
Q5: Is this calculation suitable for all bike types?
A: This is optimized for mountain bikes. Road bikes typically use different factors (often around 0.25).