Page 18 - 2016-v.1-Part 5(EN)

If the handlebar meets the requirement as specified in TBIS 4210-2:2016, 4.7.7.2, and conduct stage 3
out-of-phase of the test with the assembly in the same mountings.

4.9.1.3 Test method for stage 3 (out-of-phase)

Apply fully reversed forces of stage 3 out-of-phase F 6 at a position 50 mm from the free end for each
side of the handlebar for 100 000 cycles, with the forces at each end of the handlebar being out of
phase with each other and parallel to the axis of the handlebar stem, as shown in Figure 10 a). The
maximum test frequency shall be maintained as specified in TBIS 4210-3:2016, 4.5.
If the handlebar meets the requirement as specified in TBIS 4210-2:2016, 4.7.7.2, and conduct stage 4 of
the test with the assembly in the same mountings.

4.9.1.4 Test method for stage 4 (in phase)

Apply fully reversed forces of stage 4 in phase F 7 at a position 50 mm from the free end for each side
of the handlebar for 100 000 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.

4.9.2 Test method for racing bicycles

4.9.2.1 Test method for stage 1 (out-of-phase)

Unless the handlebar and stem are permanently connected, e.g. by welding or brazing, align the hand
grips or the equivalent parts of the handlebar in a plane perpendicular to the steering axis (see Figure 12),
and secure the handlebar to the stem according to the manufacturer’s instructions.

Clamp the handlebar stem securely in a fixture to the minimum insertion depth as specified in
TBIS 4210-2:2016, 4.7.3, or in the case of a stem extension which is intended to be clamped to an
extended fork steerer, secure the stem-extension using the manufacturer’s recommended tightening
procedure, to an extended fork steerer which is secured in the fixture with the appropriate length
projecting.

Attach to the handlebar two suitable devices that reproduce the brake-lever fixtures without either
reducing or increasing the local handlebar strength. Each device shall incorporate a pin for connection
to a ball joint with its axes located 15 mm from the outer surface of the handlebar, or such greater
distance which accurately reproduces the position of the appropriate brake lever pivot (see Figure 12).

Through the ball joints, apply reversed forces of stage 1 out-of-phase F 6 to the pin of the device on each
side of the handlebar for 120 000 cycles, with the forces at each side of the handlebar being out of
phase with each other and parallel to the axis of the fork steerer as shown in Figure 13 a). The forces
are given in Ta ble 7. The maximum test frequency shall be maintained as specified in TBIS 4210-
3:2016, 4.5.

If the assembly meets the requirement as specified in TBIS 4210-2:2016, 4.7.7.2, conduct stage 2 (in
phase) of the test on the same assembly, in the same mountings.

4.9.2.2 Test method for stage 2 (in phase)

Through the ball joints, apply reversed forces of stage 2 in phase F 7 to the pin of the device on each side
of the handlebar for 120 000 cycles, with the forces at each side of the handlebar being in phase
with each other and parallel to the axis of the handlebar stem of the fork steerer, as shown in Figure
13 b). The forces are given in Ta ble 7. The maximum test frequency shall be maintained as specified in
TBIS 4210-3:2016, 4.5.

If the assembly meets the requirement as specified in TBIS 4210-2:2016, 4.7.7.2, conduct stage 3 (out-of-
phase) of the test on the same assembly, in the same mountings.
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