Page 29 - 2017-v.2-Part 4(EN)

Key
α 90° to 120°
β 30° to 60°
a 150 mm to 200 mm
1 water nozzles

NOTE Applicable to all types of brake.

Figure 16 — Water nozzle arrangement for the wet braking test

4.6.5.6 Vertical force on the tested wheel

The wheel to be tested shall be forced vertically downwards so that no skidding of the wheel occurs
when tested according to 4.6.5.7 item c) 1) and 2). The necessary force can be applied anywhere on the
bicycle (wheel axle, bottom bracket, seat-post, etc.) provided that it is exerted vertically downwards.

4.6.5.7 Test method

a) General

Test the front and rear wheels individually.

b) Running-in the braking surfaces

Conduct a running-in process on every brake before the performance test is performed.

In order to determine the operating force to be used during the running-in process, mount and
load the bicycle on the test machine with the belt or drum running at the specified speed and apply
an operating force to the brake lever or the pedal that is high enough to achieve a braking force

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