iPhone Screenshots


Gates Carbon Drive is the high tech belt drive offering for bicycles. This app is designed to help your bike find its true belt drive potential.
Interested in key parameters of your drive like speed ratio or center distance? Want to know what belt lengths or sprocket sizes will fit your ride? What about comparing one bike to another to tweak your ratio perfectly? With our calculator and catalog, you can stay on top of the perfect setup for your drive.
What about tension? Is my tension too high or too low? Don’t have a proper tool? Well now we’re putting one of the easiest and best tension tools right into your iPhone (or iPod touch with microphone – not included). Just pluck your belt like a guitar string, and use the microphone on your iPhone to read the frequency that it’s vibrating at. Compare your belts frequency to the included chart to see if you need to adjust the tension.

-Find key parameters of your drive such as speed ratio and center distance
-Change belt length or sprocket sizes to better suit your riding needs
-Compare two belt drive bikes to each other
-Check out what sprocket sizes, mounting options, and belt lengths are available in our catalog
-Check tension with our frequency measuring tool (iPod Touch needs an external microphone)

What’s New

Version 1.7.7

Bug fixes and minor changes.

Ratings and Reviews

3.5 out of 5
17 Ratings

17 Ratings

1111MC ,

Great Tool for Frame Builders

Great App!

Needs a few updates based on current product offering.

Tension feature works great!

Kdo123 ,


Dark blue text on a dark background is really hard to read.
Should have clear images or short video showing exactly where to hold and how to pluck belt.
Feels like it was designed by engineers and for people who already know what they are doing, not for the first time user.

Bennnnnyman ,

Interesting but not repeatable.

This is a really interesting idea, and double concept to check the belt tension. Unfortunately, every time I pluck the belt it resonates at a different frequency. I suppose a rule of thumb for testing manually is probably good enough.

App Privacy

The developer, Gates Corporation, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


Gates Corporation
3.8 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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