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Your perfect fit.
Completely free.
BikeSPEZL gives every rider a complete body-to-bike design process — from biomechanical measurement to geometry optimisation, bike configuration and ride dynamics simulation. No subscription needed to get started.
No credit card · Free forever for your first bike
Why does fit matter?
Most riders are riding a bike that doesn't fit them. BikeSPEZL changes that — without an expensive fitting session.
Start with your body
Enter your measurements once. Your BDC (Biomechanical Dimension Capture) profile drives every recommendation.
Get the right geometry
Your body proportions define the ideal reach, stack, and seat angle — not the size label on the box.
Build & simulate for free
Configure your bike, check compatibility and simulate your ride dynamics. All included. All free.
What's included — Free
BDC Body Scan
Enter your body measurements (or let the system auto-calculate from height) to create a precise biomechanical profile.
Optimised Geometry
Generate a rider-specific frame geometry recommendation based entirely on your BDC data — not guesswork.
Bike Configurator
Build your perfect bike part by part with integrated compatibility checks and links to online shops.
Ride Dynamics (view)
See how your geometry performs across different riding situations — weight distribution, sag, and suspension.
Kinematic Analysis (view)
Visualise the kinematic behaviour of your build: leverage ratios, anti-squat and axle path.
Dive deeper
Everything you want to know about the free Rider tier — expand any topic.
Ready to find your perfect ride?
Create your free account and complete your first BDC scan in minutes.