Bedienungsanleitung Specialized 2007 (Seite 9 von 60) (Englisch)

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C. Mechanical Safety Check

Routinely check the condition of your bicycle before every ride.

 Nuts, bolts screws & other fasteners: Because manufacturers use

a wide variety of fastener sizes and shapes made in a variety of materials,

often differing by model and component, the correct tightening force or

torque cannot be generalized. To make sure that the many fasteners on your

bicycle are correctly tightened, refer to the Fastener Torque Speciﬁcations in

Appendix D of this manual or to the torque speciﬁcations in the instructions

provided by the manufacturer of the component in question. Correctly

tightening a fastener requires a calibrated torque wrench. A professional

bicycle mechanic with a torque wrench should torque the fasteners on you

bicycle. If you choose to work on your own bicycle, you must use a torque

wrench and the correct tightening torque speciﬁcations from the bicycle

or component manufacturer or from your dealer. If you need to make an

adjustment at home or in the ﬁeld, we urge you to exercise care, and to have

the fasteners you worked on checked by your dealer as soon as possible.

WARNING: Correct tightening force on fasteners –nuts, bolts,

screws– on your bicycle is important. Too little force, and the

fastener may not hold securely. Too much force, and the fastener

can strip threads, stretch, deform or break. Either way, incorrect

tightening force can result in component failure, which can cause

you to loose control and fall.

 Make sure nothing is loose. Lift the front wheel off the ground by two

or three inches, then let it bounce on the ground. Anything sound, feel or

look loose? Do a visual and tactile inspection of the whole bike. Any loose

parts or accessories? If so, secure them. If you’re not sure, ask someone

with experience to check.

 Tires & Wheels: Make sure tires are correctly inﬂated (see Section

4.G.1). Check by putting one hand on the saddle, one on the intersection

of the handlebars and stem, then bouncing your weight on the bike while

looking at tire deﬂection. Compare what you see with how it looks when

you know the tires are correctly inﬂated; and adjust if necessary.

 Tires in good shape? Spin each wheel slowly and look for cuts in the

tread and sidewall. Replace damaged tires before riding the bike.

 Wheels true? Spin each wheel and check for brake clearance and side-to-

side wobble. If a wheel wobbles side to side even slightly, or rubs against or hits

the brake pads, take the bike to a qualiﬁed bike shop to have the wheel trued.

CAUTION: Wheels must be true for rim brakes to work effectively.

Wheel trueing is a skill which requires special tools and experience.

Do not attempt to true a wheel unless you have the knowledge,

experience and tools needed to do the job correctly.

 Wheel rims clean and undamaged? Make sure the rims are clean and

undamaged at the tire bead and, if you have rim brakes, along the braking

surface. Check to make sure that any rim wear indicator marking is not

visible at any point on the wheel rim.

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