Last Updated: April 28, 2026 Bike gear ratio = front chainring teeth ÷ rear cog teeth. A 50/14 gear (50t chainring, 14t cog) gives a ratio of 3.57, meaning the rear wheel spins 3.57 times for each pedal revolution. Multiplying ratio by wheel circumference (≈2.1m for 700×25c) tells you how far you travel per pedal … Continue reading Ultimate Guide To Bike Gear Ratios (With Bike Gear Ratio Calculator)