Bike Gear → Speed Calculator
Speed from chainring, cog, wheel size and cadence — gear-ratio truth for upgrades and singlespeeds.
50×17 at 90 rpm on 28s is ~33.9 km/h — the table answer behind 'what gear was I pushing?'. Singlespeeders optimise one ratio for their terrain (2.7–2.9 road, ~2.0 trail); everyone else can sanity-check whether that 11-34 cassette upgrade actually adds usable range or just duplicates ratios.
Formula
For general information only — not medical or training advice. Estimates vary between individuals; consult a qualified professional before changing your exercise or nutrition routine.
Speed from chainring, cog, wheel size and cadence — gear-ratio truth for upgrades and singlespeeds. The Bike Gear → Speed Calculator is a free, private gear ratio speed tool — every result computes instantly in your browser with no sign-up and no data upload.
About Bike Gear → Speed Calculator
50×17 at 90 rpm on 28s is ~33.9 km/h — the table answer behind 'what gear was I pushing?'. It applies speed = (ring÷cog) × wheel circumference × cadence. Use the Bike Gear → Speed Calculator to get an instant, clearly-explained result with the working shown step by step — free, private and with the source method cited.
How to use Bike Gear → Speed Calculator
- 1Enter your details in the Bike Gear → Speed Calculator input fields above.
- 2The result updates instantly with the working and reference bands shown.
- 3Adjust any value to explore how it changes the outcome — it's free and unlimited.
Why use Bike Gear → Speed Calculator?
- ✓Instant gear ratio speed result that recomputes as you type — no waiting, no page reloads
- ✓100% client-side: your health data never leaves your browser
- ✓Shows the actual formula and your numbers substituted in, so you can see exactly how the result is reached
- ✓Based on published, citable sources (Sheldon Brown — gear theory reference)
- ✓Free forever with no sign-up, account or app install
Frequently asked questions
How does the Bike Gear → Speed Calculator work?+
50×17 at 90 rpm on 28s is ~33.9 km/h — the table answer behind 'what gear was I pushing?'. The calculation uses the formula: speed = (ring÷cog) × wheel circumference × cadence. Everything runs instantly in your browser as you type — your inputs are never uploaded.
Is the Bike Gear → Speed Calculator accurate, and what is it based on?+
The method is traceable to authoritative sources: Sheldon Brown — gear theory reference. Results are estimates — individual variation always applies, so treat the output as a well-grounded starting point.
Is the Bike Gear → Speed Calculator free and private?+
Yes. It's completely free with no sign-up, and all computation happens locally in your browser, so none of your health data ever leaves your device.
Can I use this for medical decisions?+
This tool is for general fitness information only, not medical or training advice. Consult a professional before changing your routine.
What can I use the Bike Gear → Speed Calculator for?+
It's commonly used for gear ratio speed, bike gear calculator, cadence speed. Speed from chainring, cog, wheel size and cadence — gear-ratio truth for upgrades and singlespeeds.
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