Gears (for Bike Mechanics)
version 1.1 

questions, comments: 

Gears (for Bike Mechanics) is intended for bike mechanics and enthusiasts alike. The app calculates the amount of travel per pedal stroke for each gear in a chosen combination of chainrings, cogs and wheel sizes.
The user can build as many bike configurations as they need. Each can be tailored to different bikes or multiple combinations for a single bike can be created allowing comparisons to be made.
Ultimately, the user can optimize gear ratios by maximizing flexibility and minimizing duplication.