Page 74 - Urban Jungle mode d'emploi_EN_HD

Operation and control
Derailleur gears always work according to the following principle:
Large front chainring Small front chainring Large rear sprocket Small rear sprocket
– high/heavy gear – low/easy gear
– low/easy gear
– high/heavy gear
– higher gear ratio – lower gear ratio – lower gear ratio – higher gear ratio
Normally, the shifters are mounted as follows: Shift lever right – rear sprockets
Shift lever left – front chainrings
Modern URBAN JUNGLE city/trekking bikes can have up to 30 gears. As there are, however, overlapping ranges, actually 15 to 18 gears are usable. It is not advisable to use gears which involve an extremely oblique run of the chain, as this reduces power transmission efficiency and hastens wear of the chain.
An unfavourable run of the chain is when the smallest chainring is used with one of the two or three outermost (smallest) sprockets (c) or when the largest chainring is used with one of the inmost (largest) sprockets (d).
The bottom bracket (e) is the interface between cranks and frame. There are different designs, in some cases the bearing spindle is part of the bottom bracket, in some other cases it is integrated into the right crank. Sealed bottom brackets are maintenance free and delivered without play ex works. The bottom bracket in the frame must be checked for play at regular intervals.
Also check at regular intervals whether the cranks are firmly attached to the bearing spindle or whether there is play. Grab the crank and try to jiggle it forcefully. It must be absolutely free of play (f). If you notice any play, contact your URBAN JUNGLE dealer immediately.
d
e
f
| 74 | ORIGINAL OPERATING INSTRUCTIONS