Best Bike Gear Ratio Calculator – Free + Online Bike Gear Ratio Calculator Bike Gear Ratio Calculator Front Gear Teeth: Rear Gear Teeth: Pedal Rotations per Minute (Cadence): Wheel Size (inches): Bike Type: Road Bike Mountain Bike Hybrid Terrain Type: Flat Hilly Rider Experience Level: Novice Intermediate Advanced Desired Speed (mph): Calculate Reset Result: Gear Ratio: Estimated Speed: mph