RIDLEY Bicycle Bedienungshandbuch PDF herunterladen (Seite 25)

Make sure that your hands can reach and

squeeze the brake levers comfortably. If

your hands are too small to operate the

levers comfortably, consult your dealer

before riding the bike. The lever reach

may be adjustable, or you may need a

different brake lever design.

Most brakes have some form of quick

release mechanism to allow the brake

shoes to clear the tire when a wheel is

removed or reinstalled. When the brake

quick release is in the open position, the

brakes are inoperative. Ask your dealer to

make sure that you understand the way

the brake quick release works on your bike

(see Fig. 16A, B,C &D) and check each

time to make sure both brakes work

correctly before you get on the bike.

Brakes are designed to control your

speed, not just to stop the bike. Maximum

braking force for each wheel occurs at the

point just before the wheel "locks up"

(stops rotating) and starts to skid. Once

the tire skids, you actually lose most of

your stopping force and all directional

control. You need to practice slowing and

stopping smoothly without locking a wheel.

The technique is called progressive brake

modulation. Instead of jerking the brake

lever to the position where you think you'll

generate appropriate braking force,

squeeze the lever, progressively

increasing the braking force. If you feel the wheel begin to lock up,

release pressure just a little to keep the wheel rotating just short of

lockup. It's important to develop a feel for the amount of brake lever

pressure required for each wheel of different speeds and on different

surfaces, to better understand this, experiment a little by walking

your bike and applying different amounts of pressure to each brake

lever, until the wheel locks.

WARNING: Some bicycle brakes, such as linear-pull and disc

brakes, are extremely powerful. You should take extra care in

becoming familiar with these brakes and exercise particular care

when using them. Applying these brakes too hard or too suddenly

can lock up a wheel, which could cause you to lose control and fall.

When you apply one or both brakes, the bike begins to slow, but your

body wants to continue at the speed at which if was going. This

causes a transfer of weight to the front wheel (or, under heavy

braking, around the front wheel hub, which could send you flying

over the handlebars). A wheel with more weight on it will accept

greater brake pressure before lockup; a wheel with less weight will

lock up with less brake pressure. So, as you apply brakes and your

weight shifts forward, you need to transfer your body toward the rear

of the bike, to transfer weight back on to the rear wheel; and at the

same time, you need to both decrease rear braking and increase

front braking force. This is even more important on steep descents,

because descents shift weight forward.

The keys to effective speed control and safe stopping are controlling

wheel lockup and weight transfer. Practice braking and weight

transfer techniques where there is no traffic or other hazards and

distractions.

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