Page 14 - 2017-v.2-Part 4(EN)

TBIS 4210-4:2017

4.3 Brake-block and brake-pad assemblies — Security test

Conduct the test on a fully assembled bicycle with the brakes adjusted to a correct position with a rider
or equivalent mass on the saddle. The combined mass of the bicycle and rider (or equivalent mass) shall
be 100 kg.

Actuate each brake lever with a force of 180 N applied at the point specified in Figure 5 or a force
sufficient to bring the brake lever into contact with the handlebar grip, whichever is lesser. Maintain
this force while subjecting the bicycle to five forward and five rearward movements, each of which is
not less than 75 mm distance.

Then conduct the test described in 4.4 or 4.5 as appropriate, depending on the style of brake, and then
the test described in 4.6.

4.4 Hand-operated braking-system — Strength test

Conduct the test on a fully assembled bicycle. After it has been ensured that the braking system is
adjusted according to the recommendations in the manufacturer’s instructions, apply a force to the
brake lever at the point specified in Figure 5. This force shall be 450 N, or such lesser force as is required
to bring

a) a brake lever into contact with the handlebar grip or the handlebar where the manufacturer does
not fit a grip,

b) a brake extension lever level with the surface of the handlebar or in contact with the handlebar, and

c) a secondary brake lever to the end of its travel.

Repeat the test 10 times on each brake lever, secondary brake lever, or extension lever.

4.5 Back-pedal braking system — Strength test

Conduct the test on a fully assembled bicycle. After it has been ensured that the braking system is
correctly adjusted, and with the pedal cranks in a horizontal position, as shown in Figure 6, apply a
vertically downward force to the centre of the left-hand pedal spindle. Increase the force progressively
to 1 500 N and maintain fully for 1 min.

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