Page 17 - 2017-v.2-Part 4(EN)

Apply a handgrip force not exceeding 180 N at the point as specified in Figure 5. Check before and after
each series of test runs to verify the lever force.

b) Optional brake-force application device

It is permissible to use a test mechanism to operate the brake lever, and when such a device is used, it
shall meet the requirements of 4.6.3.4 item a) and shall additionally control the rate of application of the
brake lever force such that 63 % of the intended lever force is applied in not less than 0,2 s.

4.6.3.5 Running — in the braking surfaces
A running-in process shall be conducted on every brake before performance testing is carried out.

Apply the brakes for not less than 3 s to maintain steady deceleration while the bicycle is being ridden at
a speed of approximately 16 km/h. Repeat this operation 10 times.

4.6.3.6 Test method — Test runs under dry conditions

Pedal the test bicycle until the specified test velocity is attained. Then stop pedalling and apply the brakes.
The bicycle shall be brought to a smooth, safe stop

4.6.3.7 Test method — Test runs under wet conditions

The method shall be as given in 4.6.3.6, with the addition that wetting of the brake system(s) shall
commence not less than 25 m prior to the commencement of braking and shall continue until the bicycle
comes to rest. Excessive amounts of water can be swept from the test track surface between runs.

4.6.3.8 Number of valid test runs

a) If the gradient of the track is less than 0,2 %, the following runs shall be made:

1) five consecutive valid runs under dry conditions;

2) two acclimatization runs under wet conditions (results not recorded);

3) five consecutive valid runs under wet conditions.

b) If the gradient of the track lies between 0,2 % and 0,5 %, the following runs shall be made:

1) six consecutive valid runs under dry conditions with alternate runs in opposite directions;

2) two acclimatization runs under wet conditions (results not recorded);

3) six consecutive valid runs under wet conditions with alternate runs in opposite directions.

A rest period not exceeding 3 min can be taken between successive runs.

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