Page 37 - TBIS_15194-2019_(EN)_3nd
P. 37
TBIS 15194:2019
1 Chain
2 Hub sprocket
3 Left crank
4 Cycle chain-wheel and pedal crank
5 Point of force application
6 Pedal
Figure 5 — Back-pedal brake test
4.3.5.9 Braking performance
4.3.5.9.1 General
The progressive characteristics of the brake are determined by linearity
measurements. A final, simple track test checks for smooth, safe, stopping
characteristics.
NOTE See 4.3.5.9.5.6 h) “Test method —simple track test”.
Conduct the braking-performance test on a fully-assembled bicycle after the brakes
have been subjected to the strength test detailed in 4.3.5.7, 4.3.5.8. Before testing
the bicycle, inflate the tyres and adjust the brakes all according to the
manufacturer's instructions, but in the case of rim-brakes to the maximum clearance
specified by the manufacturer.
4.3.5.9.2 Requirements
Where EPAC is fitted with secondary brake-levers attached to brake-levers, bar-ends
or aerodynamic extensions, separate tests shall be conducted for the operation of
the secondary brake-levers in addition to tests with the normal levers.
When tested in accordance with 4.3.5.9.5, the bicycle shall fulfil the requirements
shown in Table 1.
Table 1 — Calculated braking performance value
2
Condition Brake in use the value of acceleration(m/s )
Dry Front only MTB:4.25
Other type:3.40
N
Rear only MTB:2.80
Other type:2.20
Wet Front only 2.64
Rear only 1.68
NOTE These values are based on the reference mass ”m“ (100 kg).
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