Fit
Use height and optional measurements for a starting frame and riding-position direction, not a professional fitting prescription.
Build a single-speed
that fits you.
Find the right fit, gearing, and components for the way you ride.
Start building
Why YourBikeBuilder
Build with a reason behind every choice.
YourBikeBuilder is a guided single-speed bicycle planning tool, not a bike shop, fitting service, or large catalogue. Begin with how you ride, your needs, budget, and what you already know.
Six answers create a starting build with reasons for fit, gearing, and component recommendations. Refine one decision at a time, enter parts you own, and add technical details when useful.
A recommendation is a direction to consider, not a selected physical product or a promise that every part fits.
Start buildingStarting directionSix questions answered
Frame directionBased on your riding needs
SuggestedGearingReason and trade-offs explained
SuggestedFork fitSteerer dimensions still unknown
Needs detailsChoose a product or add specifications to make this example more precise.
How it works
Start simple. Refine when you want.
You need not know your bottom bracket standard or frame geometry. Technical information appears when a decision needs it.
- 01
Tell us how you ride
Answer six questions about purpose, environment, priorities, budget, height, and guidance. They establish a direction without requiring bicycle standards knowledge.
- 02
Get your starting build
See directions for frame, gearing, tires, handlebar, and crank length. Each recommendation explains which answers influenced it.
- 03
Refine one decision at a time
This is not a locked final bicycle. Add fit details, enter existing parts, compare products, and keep concrete choices for later recommendations.
Questions Starting build Refined build
Compatibility
A bike is a system, not a list of parts.
Good components do not automatically make a compatible bicycle. A frame affects fork, headset, seatpost, wheel size, brakes, and tire clearance. Crankset, bottom bracket, chainring, chain, rear hub, and freewheel also depend on one another.
The Builder keeps dependencies visible. It distinguishes suggestions from selected parts, missing specifications, choices needing review, and comparisons supported by recorded facts. Start with a frame, an existing wheelset, or gearing, then fill in the rest.
Unknown specifications stay unknown. A visual preview does not prove physical fit, and a “Checked” comparison does not certify the entire bicycle.
One choice can affect the next
Frameaffects Fork · headset · seatpost · wheels and tire clearance
How the Builder describes evidence
- Suggested
- A direction from your answers, not a product selection.
- Needs details
- A required specification has not been recorded.
- Check again
- A preserved choice needs review after another change.
- Checked
- Only the named, recorded comparison passed.
Your build
See how the decisions connect.
Work through a complete single-speed build in your own order. Recorded specifications make the planning view more precise.
Gearing
Explore how chainring and freewheel choices change acceleration, cruising feel, cadence, rollout, and estimated speed.
Components
Review the parts of the bicycle in an order that suits the decisions you already know.
Compatibility
See what is known, what depends on another part, and where a specification is missing.
Wheels and tires
Connect wheel dimensions and tire width with clearance, brakes, riding conditions, and gearing estimates.
Existing parts
Enter components you own as constraints while planning the pieces you still need.
Built to grow with your knowledge
You do not need to know everything before you start.
New to building
The first questions use information you are likely to know. The result explains what each recommendation means, and missing details can wait until they matter.
Already know your setup
Enter existing components, adjust specifications directly, keep intentional choices, and use the compatibility information to review the remaining bicycle.
Start with six questions. Go as deep as your build requires.
Good to know
Frequently asked questions
What is YourBikeBuilder?
A guided tool for planning a single-speed bicycle. Six answers create a starting build, with reasons you can review and refine as you go.
Do I need to know a lot about bikes?
No. Start with how you ride, your height, budget, and priorities. Technical standards appear when they help with a decision.
Does it check whether components are compatible?
It tracks relevant specifications and dependencies. Missing information stays unresolved; a suggestion alone does not confirm that parts fit.
Can I use components I already own?
Yes. Record existing parts as constraints for recommendations about what you still need.
Is it for fixed-gear bikes?
The current main experience plans a single-speed bicycle with a freewheel. Fixed-gear is not the current product mode.
Does it replace a professional bike fit?
No. Sizing and fit are starting guidance. Seek a professional fitting for pain, physical limitations, or precise performance needs.
Where are my builds saved?
Builds are saved in this browser, not synchronized to an account. Export a .ybb backup before clearing browser data or changing devices.
Your build starts here
Give your build a clear starting point.
Answer six questions, get a practical starting setup, understand why each recommendation exists, and refine one bicycle decision at a time.
Start building