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Learn4 practical guides
Evidence-led bicycle setup guides
Plain-language guides tied to published sources, product conventions and stated limits. See what is measured, what is assumed and what remains uncertain.
Understandthe claim
Measurethe baseline
Re-checkone change
Research, translated for the workbench
Understand the claim, see its limit, then make one change you can measure again.
Choose your path
Start with the question you actually have
The map keeps long-form evidence, practical measurement and safety boundaries close together instead of turning the library into one wall of text.
Topic 011 guides
Build a baseline
Start with measurements, understand the limits, and record a position you can restore.
MethodFeatured field guide
Change one thing, then re-check
The fastest way to a good fit is small, reversible steps you can actually measure.
Read the complete guideTopic 033 guides
Make better decisions
Separate rules, goals and confidence from claims the evidence cannot support.
GoalsFeatured field guide
Your best fit depends on what you're trying to do
Endurance, racing, commuting and aero goals select different mechanical reference bands. There is no single correct position.
Read the complete guide
02RulesIn-depth
“UCI-legal” is not the same as a fit result
Race rules constrain where parts can go. They do not establish an individual mechanical target.
Read guide
03ConfidenceIn-depth
Why this app talks about confidence so much
A phone video has real limits. Honest uncertainty beats a confident wrong answer.
Read guideOpenBikeFit records mechanical setup, compares repeated measurements and presents published reference ranges with their limitations. It is for adults without an active health or injury concern and does not assess symptoms, decide whether riding is medically safe, recommend care or predict health outcomes. Outputs are measurement hypotheses, not verified facts or prescriptions.