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TBIS 79010:2019
The braking deceleration value shall be calculated using the following equation:
F=ma

F＝ F Br max is the maximum F Br average（N）
m＝CARGO BIKE＋rider（kg）
2
a＝ deceleration (m/s )

f) Linearity
Plot the calculated F Br average values (the arithmetic mean of the three corrected
braking forces at each level of operating force) against the equivalent operating force
values, F Op intend, in order to assess the linearity against the requirement in 4.2.2.9.2.
Plot the results on a graph, showing the line of best fit and the ± 20 % limit lines
obtained by the method of least squares outlined in Annex F.
g) Ratio between wet and dry braking
D
Ratio between wet and dry braking For each F Op where F Br average is > 200 N, the ratio
of braking performance wet/dry shall be greater than 4:10.determine (using the

following formula) whether or not the requirements of have been met:
w D
F Br average: F Br average

For symbols see 4.2.2.9.3.2.

h) Simple track test

After completion of the machine test, conduct a brief, simple track test with

progressively increasing operating forces to determine whether or not the brakes
bring the bicycle to a smooth, safe stop.

NOTE This test can be combined with the test on the fully-assembled bicycle.

4.2.2.10 Brakes – Heat-resistance test

4.2.2.10.1 General

This test applies to all disc-and hub-brakes but to rim-brakes only where they are
known or suspected to be manufactured from or include thermoplastic materials.

Each brake on the bicycle shall be tested individually, but where the front and rear

brakes are identical only one brake need be tested.

4.2.2.10.2 Requirement

Throughout the test described in 4.2.2.10.3, the brake-lever shall not touch the
handlebar-grip, the operating force shall not exceed 180 N, and the braking force

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