Bedienungsanleitung Cervelo General - 2012 (Seite 21 von 68) (Englisch)

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I General User Manual 21

14 Bottom bracket and cranks

Chainrings are wear parts. Their service life depends on

various factors, e.g.

•maintenance and care,

•type of use and

•distance travelled.

15 Checking the bottom bracket

The cranks must be securely fastened as this could

otherwise damage the crankset.

›The cranks can come loose which is why you should

regularly check whether they are securely fastened

by attempting to rock them to and o.

›If there is play in the cranks, have the bike checked

and the cranks fastened securely by a professional

bike workshop .

If your bike has a carbon ame and a bottom bracket

housing for a BB30 bottom bracket please note the

following:

In this case you can t an adapter so that a bottom

bracket with conventional BSA thread can be used.

However, bear in mind

•You can only install the adapter if the ame is

completely undamaged. Repairing a defective

BB30 housing serves no purpose. If it is not

installed correctly, the bottom bracket housing

may be damaged which would render the war-

ranty void. This kind of adapter should only be

tted by a specialist cycle shop.

•Once the adapter has been tted in the carbon

ame it cannot be removed.

16 Wheels

16.1 Checking the wheels

The wheels connect the bike with the surface you are rid-

ing on. The wheels are subject to a particularly high level

of stress due to unevenness of the riding surface and the

weight of the rider.

The wheels are carelly checked and trued prior to de-

livery. However, the spokes may settle when you ride the

rst kilometres on your bike.

›Have the wheels checked again and trued if neces-

sary aer the rst 100 kilometres by a specialist

cycle shop.

›You should subsequently regularly check the ten-

sion in the spokes and have loose or damaged

spokes replaced, and/or have the wheel trued, by a

specialist cycle shop.

The wheel can be attached to the ame and fork in a num-

ber of dierent ways. In addition to the standard systems

in which the wheel is held on by axle nuts or quick-release

devices, dierent types of oating axles exist. These can

be held in place by a screw connection or dierent types

of quick-release devices. If your bike has a oating axle,

please also refer to the enclosed manufacturer's user man-

ual or visit the web pages of the relevant manufacturer in

the Internet.

Tighten all screws to the prescribed torque as other-

wise screws could shear o and components could

come loose or detach altogether (see ➠ Chapter 30

"Technical data").

16.2 Checking the hubs

To check the hub bearings, proceed as follows:

›Li the wheel and spin it.

›Check whether the wheel continues to turn through

several revolutions before it stops moving. If it

stops suddenly, the bearing is damaged. This does

not apply for ont wheels with hub dynamos.

›To determine whether there is play in the hub bear-

ing, try rocking the wheel in the bike fork or rear

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