Calculadora de Relación de Cambios de Bicicleta Gratis
Calcula la relación de cambios y desarrollo de tu bicicleta para cada combinación de piñones.
Relación de Engranajes
2.94
Gear Ratio vs Chainring Teeth (front)
Fórmula
How Bike Gear Ratios Work
Formula
Gear Ratio = Chainring Teeth / Cog Teeth
Development = Gear Ratio x Wheel Circumference
Development tells you how far the bike travels per pedal revolution. Higher gear ratios mean more distance per revolution but require more force.
Gear Inches
Gear inches is a traditional measure: Gear Inches = Gear Ratio x Wheel Diameter (inches).
Ejemplo Resuelto
A road bike with a 50-tooth chainring, 17-tooth rear cog, and 700mm wheels.
- 01Gear ratio = 50 / 17 = 2.94
- 02Wheel circumference = 700 * 3.14159 = 2199 mm = 2.199 m
- 03Development = 2.94 * 2.199 = 6.47 m per pedal revolution
- 04At 90 RPM: 6.47 * 90 * 60 / 1000 = 34.93 km/h = 21.71 mph
Preguntas Frecuentes
What gear ratio is best for climbing?
Lower ratios (below 1.5) are better for climbing. A 34/28 combination (ratio 1.21) is a common granny gear for steep hills.
What gear ratio is best for flat riding?
Ratios of 2.5-3.5 are typical for flat riding at moderate cadence. A 50/17 (2.94) is a common cruising gear for road bikes.
What does development mean?
Development is the distance your bike travels with one full pedal revolution. Higher development means more ground covered but more effort required.
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