Bike Fit Analyzer
Open the analyzer →
Bike fit guides
How to measure your own position from a phone video, what the numbers mean, and where this kind of analysis stops being trustworthy. Written alongside the analyzer, so the ranges quoted here are the ranges it actually grades against.
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Reference · bilingual
How the analyzer works — the measurements
What is measured from the side, front and rear views, how each bike type shifts the target angles, and the pose detection behind it. Available in English and Indonesian.
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Guide · 6 min read
How to film a bike fit video that actually measures accurately
Camera height, camera angle, and the four filming mistakes that quietly cost you several degrees. Most bad readings are bad footage, not a bad fit.
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Guide · 8 min read
The four bike fit angles, and where the target ranges come from
Knee, torso, elbow and shoulder — what each one is measuring, the target range, and why published numbers disagree with each other by about 8°.
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Guide · 7 min read
Your report says red — what to adjust first
An order of operations that starts with the free adjustments, changes one thing at a time, and tells you when to stop and leave the bike alone.
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Guide · 6 min read
What 2D video analysis can and cannot tell you
The honest limits: measurement noise of a few degrees, no cleat or Q-factor read, and the reason the front and rear views are still labelled beta.
In Indonesian
Longer write-ups covering the same ground in Bahasa Indonesia live on my main site: