Bicycle Calculator

Christoph Galle

About this app

Beta Version 5 (Update 11)

Calculation helper for bicycle entusiasts and professionals.

This app is currently under development.
More features will be added in future updates.

It calculates:
- Spoke length
- Chain Length
- Tire circumference from diameter or ISO
- Gear Inches and Transmission ratio
- Shifting Capacity with rear derailleur recommendation.
- Frame Size

Support for Android 1.6 and higher

Some descriptions and manuals will be added soon.

Mainmenu can be reached through the menu or the back-button.

Tell me if you have suggentions, wishes or you're just happy with it.

Ratings and reviews

Chain calculator is utterly inaccurate and unusable.

Chain size calc is wrong. Useless.

It has tools for building a wheel, cutting chain, calibrating a cycle computer, picking the right cassette, chain rings and rear derailleur. I tested them all and the only one that isn't accurate is the frame calculator; it's not using the rider's (inseam, torso, arm lengths) measurements and tire size plus frame geometry to calculate: frame size, stem length handlebar width and seat post position. It would be an awesome fitting tool if it worked. It would probably be way too complex to be accurate though.

What's new

- improved integrated help (did some graphics)
- Bugfix at gear inches
- added russian language