Carbon Drive

2.2
231 reviews
100K+
Downloads
Content rating
Everyone
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About this app

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.
Updated on
Mar 21, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

2.2
220 reviews
Mike Weiss
April 17, 2021
Completely useless app. Frequencies are all over the place using the exact same position and finger and strength. Closing and opening the app and changing literally nothing about the bike and you can count on getting wildly different results. I wouldn't rely on this app to tune anything. Also whoever's idea it was to kill the app instantly in the background so you have to find and open it again and watch the dumb video that automatically should never develop another app again.
10 people found this review helpful
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John Coryat
September 11, 2023
I used Carbon Drive to set the belt tensions on my exotic sports car. It worked perfectly. Two things that will make this tool easier to use: 1) Be very close to the belt with the microphone of your device. 2) Kill all sources of noise in the room, especially air conditioners and fans. They put out noise in the same frequency range and will mess up your readings. A third suggestion is to look closely at the microphone opening in your device. It's likely clogged with lint and crud. Clean it up!
2 people found this review helpful
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Jeff Miller
April 22, 2021
The old app was great. Pretty accurate readings were given. Since the new update/redesign the app is pretty garbage. I can get readings, but the timeframe of when I actually get the reading or what it's getting it from mis random. This is coming from a zero tech who works with this app pretty frequently. It takes me twice as long to get a belt tension done because I can't tell what the hell this app is reading for sound.
10 people found this review helpful
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What's new

- Updated belt length options
- Added Custom functionality on the Calculate tab for specialty drive calculations
- Added calculator memory so that selected values are maintained while moving back and forth between tabs