Mountain Bike Gear Ratio Calculator. Intuitively, gear ratios serve to convert between the revolutions the wheel travels and the revolutions the cranks turn. "Gear inches" is how far your bike travels with one complete turn of the pedals. The selection of internal-gear hubs in the Calculator is complete except for one a few new models whose gear ratios have not been made public, and some very rare antiques.
Ratio of the highest gear of your setup. This is the ultimate mountain bike gear for head protection. Using a gear-inch chart is one way to compare gear ratios without riding the bike.
I'm trying to find a magic gear calculator.
Enter the wheel size, tire size, number of chain rings, number of teeth, select a cassette size (and optionally the individual cogs) and this tool will help you figure out how much easier or harder your gearing will be if you switch it or buy a new bike with different gearing that your current bike.
Gear Inches is gear ratio times the diameter of the rear wheel. Ratio of the highest gear of your setup. In this guide, we will explore all the ins and outs about the best gear ratio for fixed gear or single speed bike.