Bicycle Zahnrad Ratio Rechner
Berechnen Sie bicycle gear ratio, development distance, and speed aus chainring, cog size, and cadence.
Übersetzungsverhältnis
2.94
Gear Ratio vs Front Chainring Teeth
Formel
## Bicycle Gear Ratios The gear ratio determines how far the bike travels per pedal revolution and directly affects speed and effort. ### Formula **Gear Ratio = Front Teeth / Rear Teeth** **Development = Gear Ratio x Wheel Circumference** **Speed = Development x Cadence x 60 / 1000** Higher ratios (big front, small rear) mean higher speed but more effort. Lower ratios (small front, big rear) are easier for climbing.
Lösungsbeispiel
50-tooth chainring, 17-tooth rear cog, 2.1 m wheel, 80 rpm cadence.
- 01Gear ratio = 50 / 17 = 2.94
- 02Development = 2.94 x 2.1 = 6.18 m per pedal turn
- 03Speed = 6.18 x 80 x 60 / 1000 = 29.6 km/h
Häufig Gestellte Fragen
What gear ratio is good for climbing?
A ratio below 1.5 (like 34/28) is comfortable for steep hills. Mountain bikes may go as low as 0.85 (24/28) for extreme climbs.
What is gear inches?
Gear inches = Gear Ratio x Wheel Diameter (inches). This older system is still used by track cyclists and single-speed riders.
How does cadence affect speed?
In the same gear, higher cadence means higher speed. Most efficient cadence is 80-100 rpm. Elite cyclists may spin 100-120 rpm in races.
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