Page 70 - TBIS_15194-2019_(EN)_3nd

TBIS 15194:2019

4.3.7.6.3.2 Stage 2 Frame – Fatigue test with a vertical force
With the frame and front fork assembly mounted as in 4.3.7.6.3.1. Apply 50000
cycles of dynamic, vertically-downward forces of stage 2 F4(Table 16). The maximum
test frequency shall be maintained as specified in 4.3.1.5.
Table 15 — Forces on seat-stem
Force in N
Type city and young adult mountain-bicycle racing-bicycle
trekking bicycle bicycle

Stage 1 1100 1100 1200 1200
Forces,F 4
Stage 2 1200 1200 1300 1300

E Horizontal, rearward extension
H Position equivalent to that of the centre of the saddle-clamp with the bicycle
1 Free-running roller

2 Steel bar
3 Locked suspension unit or solid link for pivoted chain-stays
4 Rigid, pivoted mounting for rear axle attachment point

Figure 23 — Frame: fatigue test with a vertical force

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