Bosch i:SY E5 ZR F CX Translation Of Original Operating Instructions page 204

Check
There is a different wear gauge for each chain,
depending on the manufacturer:
Figure 187: Example of a KMC gauge
Figure 188: Example of a SHIMANO gauge
Figure 189: Example of a SRAM gauge
Figure 190: Example of a ROHLOFF gauge
Figure 191: Example of a KMC digital gauge
MY23I0a - 42_1.0_22.01.2024
Cleaning, maintenance and inspection
1 Insert gauge between two chain links on the
right-hand side.
Figure 192: Gauge is inserted
2 Lower gauge down to the left-hand side.
Figure 193: Lower gauge to the left
 If the gauge does not fit between the links, the
chain is not worn yet.
Figure 194: Gauge does not fit
 If the gauge does not fit between the links, the
chain is worn and must be replaced. Contact
specialist dealer.
Figure 195: Gauge fits
204