Page 17 - 2016-v.1-Part 5(EN)

Table 7 — Forces on handlebars and bar ends

Forces in newtons

City and trek- Young adult Mountain bicy-
Bicycle type king bicycles bicycles cles Racing bicycles
Stage 1 Out-of-phase, F 6 200 200 270 280
Stage 2 In phase, F 7 250 250 450 400
Stage 3 Out-of-phase, F 6 250 250 320 330
Stage 4 In phase, F 7 300 300 500 450

Dimensions in millimetres

a) Stage 1 and stage 3— Out-of-phase loading b) Stage 2 and stage 4 — In-phase loading

Figure 10 — Handlebar and stem — Fatigue tests for city and trekking, young adult, and mountain
bicycles

Dimensions in millimetres

a) Test for handlebar fitted with bar ends b) Test for handlebar intended for bar ends
(plan view) (plan view)

Figure 11 — Handlebar incorporating bar ends — Out of phase fatigue tests for city and
trekking, young adult, and mountain bicycles

4.9.1.2 Test method for stage 2 (in phase)

Apply fully reversed forces of stage 2 in phase F 7 at a position 50 mm from the free end for each side
of the handlebar for 120 000 cycles, with the forces at each end of the handlebar being in phase with
each other and parallel to the axis of the handlebar stem, as shown in Figure 10 b). The maximum test
frequency shall be maintained as specified in TBIS 4210-3:2016, 4.5.

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