🔬 Evidence-informed 🔧 One change at a time 🔒 Local data only

Find a more comfortable bike fit without guessing.

Record your setup, identify the most likely causes of discomfort, choose a safe first check, and track whether changes actually help.

1

Measure

Record your baseline contact-point measurements before changing anything.

2

Check

Select a symptom. Get the most likely fit variables to review first.

3

Test

Make one small adjustment. Ride. Log the result. Then decide the next step.

⚠ Important safety note

This tool is not a medical diagnosis and is not a substitute for a professional bike fitter, physiotherapist, or clinician. Stop self-adjusting and seek qualified help for sharp pain, swelling, persistent numbness, radiating symptoms, or symptoms following a crash.

Rider profile

These details help the tool give relevant starting points. No two riders are the same.

Body measurements

Height, cm

Cycling inseam, cm

Barefoot floor-to-crotch. Used as a rough saddle-height reference only.

Riding profile

Experience level

Main riding type

Typical ride duration

Weekly riding volume

Primary goal

Bike profile

Fit advice changes when equipment changes. Record what you are currently riding.

Bike & components

Bike type

Frame size

Pedal type

Crank length, mm

Printed on the crank arm near the pedal thread. Common: 170, 172.5, 175 mm.

Saddle model

Shoe model

Recent equipment or training changes

Fit measurements

Record your baseline before changing anything. Use the same method every time.

Safe adjustment rule: Change one variable at a time. Saddle height: 2–3 mm · Saddle tilt: 0.5–1° · Cleats: 1–2 mm. Retest for 1–2 rides before the next change.

Saddle

Saddle height, mm

How to measure

Centre of bottom bracket axle → top of saddle, tape parallel to seat tube.

Too low: front knee pain, cramped feeling, low power.
Too high: hip rocking, back-of-knee pain, toe-pointing.

Saddle setback, mm

How to measure

Plumb line from saddle reference point → horizontal distance to bottom bracket centre.

Too forward: front knee pressure, weight on hands.
Too back: reaching for pedals, hamstring tension.

Saddle tilt, degrees

How to measure

Digital level on the flat sitting surface. Positive = nose-up. Negative = nose-down.

Nose-up (>2°): soft-tissue pressure.
Nose-down (<−3°): forward sliding, hand overload.

Cockpit

Handlebar drop, mm

How to measure

Vertical difference: saddle top → hood/bar contact area. Positive = bars lower than saddle.

High drop (>70 mm): neck strain, shoulder tension, numb hands.

Reach to bars, mm

How to measure

Saddle nose → handlebar clamp centre. Note which reference you use — hood reach may differ.

Too long: locked elbows, shoulder tension, numb hands.

Cleats

Cleat position notes

How to check

Mark the ball of the foot on the shoe. Compare to pedal axle. Note rotation angle and float.

Problems: foot hot spots, knee tracking discomfort, Achilles strain.

Symptom troubleshooter

Select your main issue. The tool will suggest what to check first and which small adjustment is safest to test.

Symptom details

Main symptom

Severity, 0–10

When does it start?

Side affected

Notes

🚨 Red flags — tick any that apply

Sharp, severe, or worsening pain

Swelling, bruising, heat, or visible joint change

Numbness or tingling that persists after the ride

Radiating pain, weakness, or loss of control

Recent crash, acute injury, surgery, or known medical condition

Fit plan

Your plan combines your symptom, measurements, and safety checks. Treat it as a careful test plan, not a diagnosis.

Adjustment log

Track exactly what changed and whether it helped. This prevents random tweaking and builds a clear picture over time.

New entry

Date

Area changed

Old value

New value

Pain before, 0–10

Pain after, 0–10

Ride test notes

Logged changes

Learn the basics

Each section covers: what it is, why it matters, how to measure it, and what to try first.

Fit report

A simple summary you can take to a bike fitter, coach, or clinician.

Click "Build report" to generate your summary.