Page 23 - TBIS_79010-2019_(EN)_1nd
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TBIS 79010:2019
α ＝90° 至 120°
β ＝30° 至 60°
a ＝150 mm 至 200 mm
1 Water nozzles
Figure 7 — Water nozzle arrangement for the wet braking test
(Applicable to all types of brake)
4.2.2.9.3.5 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 4.2.2.9.3.6 c) 1) and 2).
NOTE It is permitted that the necessary force be applied anywhere on the bicycle
(wheel-axle, bottom bracket, seat-post, etc.) provided that it is exerted
vertically downwards.
4.2.2.9.3.6 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
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