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Single Speed Calculator — Ideal Fixed/SS Gear
Find the ideal single speed or fixed gear ratio for your terrain.
How We Calculate This
Single Speed Recommendations
The calculator suggests a chainring and sprocket based on terrain type:
- Flat: 48/16 (3.0 ratio) — faster cruising speed
- Mixed: 44/16 (2.75) — versatile all-rounder
- Hilly: 42/18 (2.33) — easier climbing
- Urban: 44/17 (2.59) — good stop-start ratio
Frequently Asked Questions
Popular ratios: 44/16 (2.75) for mixed riding, 48/16 (3.0) for flat commuting, 42/18 (2.33) for hilly areas. The ideal ratio depends on your fitness and terrain.
Fixed gear (no freewheel) gives more control and workout but requires constant pedalling. Freewheel allows coasting. Many urban riders prefer fixed for simplicity.
Start with 2.5-2.8 for mixed terrain. If you find yourself spinning out on flats, go higher. If hills are too hard, go lower. Skid patches also matter for fixed gear riders.
Related Calculators
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Cadence Calculator
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Gear Inch Calculator
Calculate gear inches, development in metres and speed at 80, 90 and 100 rpm for any chainring, cog, wheel size and tyre width combination.
Gear Inches Calculator
Convert gear ratios to gear inches for comparison.
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Last updated: June 2026
All calculations are estimates. Always verify results and consult a professional bike fitter where appropriate.