Bicycle Zahnrad Ratio Rechner — 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.
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.
- Gear ratio = 50 / 17 = 2.94
- Development = 2.94 x 2.1 = 6.18 m per pedal turn
- Speed = 6.18 x 80 x 60 / 1000 = 29.6 km/h