Type of derailleur: dial type (as shown)
The derailleur is separately positioned on both sides of the handle, and the left controls the front one, the right controls
the rear one.
4.7.2Adjustment of the derailleur
The derailleur is classified into the front derailleur and back derailleur
When the shift cables are loose or too tight, if the speed controller doesn’t work properly or the chain falls off, the H, L bolt
is adjusted.
H bolt: when the chain speed changes to the biggest fluted disc, the chain will fall off, and the H bolt will be locked.
But if it is too tight, the chain can’t climb to the biggest fluted disc.
L bolt: when the chain is toward the inside fluted disc and the chain falls off, the L bolt is locked. But if it is too tight,
the speed change can’t be downward. Therefore it is appropriate to adjust the H, L bolt to a suitable position.