Bosch ZEMO SU-E FS 12 Translation Of Original Operating Instructions page 205

With any of these methods, the tension along the
belt may vary slightly, so you should repeat the
process several times. Turn the pedal a quarter
after each measurement. Measure again.
The tools measure the tension only. They do not
provide specifications for the required voltage.
The table below contains specifications for the
correct tensioning range for Gates Carbon Drive
belts.
Steady pedalling
MTBs* and single- 45– 60 Hz
speed bicycles (35– 45 lbs)
Hub gear/pinion gear
Table 55: Specifications for tensioning
* The CDN and SideTrack systems are not
permitted for mountain bikes, e-bikes with mid-
drive motor or gears, bikes without a gear shift or
for trekking or touring bikes.
These tension specifications are designed as
initial guidance and may have to be corrected
upwards or downwards depending on the body
size, gear ratio and the force applied to the
pedals.
7.5.9.1 Gates Carbon Drive mobile app
The Gates Carbon Drive
mobile app measures the belt
tension based on the belt's
natural frequencies (Hz). To
do so, the app uses the
phone's mic to record the
sound of the belt and
determines the main frequency.

Download Gates Carbon Drive mobile app free of
charge from the App Store or Google Play on your
mobile phone.

Measure in a quiet environment.

Ensure that the phone microphone is switched
on.
MY22Z0a - 12_1.0_25.07.2022
Sports
Use
60– 75 Hz
(45– 53 lbs)
35– 50 Hz
(28– 40 lbs)
Cleaning, servicing and inspection
1 Open app.
2 Click on the voltage symbol.
3 Click on MEASURE.
4 Point phone microphone towards the belt.
5 Pluck the belt so that the belt vibrates like a
guitar string.
6 It is recommended to take several
measurements for comparison. Turn the crank
a quarter. Repeat frequency measurement.
7 Check the belt frequency displayed against the
specifications for tensions in Table 44.
 If the value is higher than the specification,
reduce belt tension,
 If the value is within the specified range, the
belt tension has been correctly adjusted.
 If the value is lower than the specification,
increase belt tension.
7.5.9.2 Gates Krikit tension meter
Not included in price

Check that the measurement indicator is at the
very bottom.
1 Extend index finger into the finger loop. Place
on the check gauge.
Figure 221: Index finger in the check gauge
2 Position check gauge on the upper surface of
the belt. Position check gauge in the middle of
the belt length.
Figure 222: Check gauge on belt
204