Buffalo Benelli Classica Series Instruction Manual page 33

Bike chain
Clean and lubricate your bike chain regularly.
To prevent premature wear of the bike chain when using derailleur gears, select gears that
keep the chain skew as marginal as possible.
To check the wear in the bike chain, proceed as follows:
Take the section of the chain that rests on the front chain ring between your thumb and
forefinger.
Pull the bike chain off the chain ring. If the bike chain can be lifted by a significant amount, it is
worn and must be replaced by a new one.
With hub gears, the chain tension must be adjusted so that vertical play of one to two
centimeters is present in the unsupported chain span between the chain ring and sprocket
wheel.
To take up the slack in the bike chain, proceed as follows:
Loosen the rear wheel nuts.
Pull the wheel back into the dropouts until only the permissible amount of play is present in
the bike chain.
Tighten all screw connections carefully clockwise.
shear off and components could come loose or detach altogether (see "Technical data").
Maintenance of bike chains
Bike chains are wear parts. Bike chains with hub gears wear out after roughly 1,000 miles,
and after roughly 500 miles with derailleur gears.
Tighten all screws to the prescribed torque as otherwise screws could
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