Bicycle Belt Tension Meter 4+

Gates Carbon Drive

Gates Corporation

Designed for iPad

    • 2.8 • 11 Ratings
    • Free



Gates Carbon Drive is the high-tech belt drive for bicycles, motorcycles, & scooters. This app measures belt tension sonically. Just pluck your belt like a guitar string and use the microphone on your phone to read the vibration frequency. Compare your bicycle belt’s frequency to the included chart to see if you need to adjust the tension. For scooter/motorcycle tension recommendations, compare to your vehicle owner’s manual.

Other available features for bicycles:

Interested in key parameters of your bicycle belt drive like speed ratio or center distance? Want to know what belt lengths or sprocket sizes will fit your bicycle? What about comparing one bike to another to tweak your ratio perfectly? With our calculator, you can stay on top of the perfect setup for your drive.

- 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.

What’s New

Version 2.4

Significant performance enhancements and bug fixes.

Ratings and Reviews

2.8 out of 5
11 Ratings

11 Ratings

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.

dgstyfutuey ,

This app does work surprisingly well but, it could be improved with a simple update.

I own a priority 600, & this app does help with tensioning the belt when used correctly in a quiet room, but it could be much easier with a simple feature. Please add a “pause button” for in between “plucks” I can’t rotate the crank 1/4th turn without a bike stand else I get a false positive because of other small noises.

Math teacher in WA ,

Leaves much to be desired

The app does not have a “record” or measure button. Thus it is unclear when no measurement is recorded whether I’m using the app wrong, if my belt is set wrong, or if there is too much background noise or other problems. I was able to get the app to work one time, but since then have never gotten any measurements recorded.

App Privacy

The developer, Gates Corporation, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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