Page 110 - TBIS_15194-2019_(EN)_3nd

TBIS 15194:2019

4.3.15.3.4 Test method
With the seat-post correctly assembled to EPAC frame at minimum insertion depth
of the seat-post, and the clamps tightened to the torque recommended by the
bicycle manufacturer, apply a force of F1 vertically downwards at a point 25 mm

from either the front or rear of the saddle, whichever produces the greater torque
on the saddle-clamp. The saddle shall be positioned in the seat post clamp assembly
as defined by the saddle manufacturer’s rail markings or instructions. Maintain this

force for 1 min. Remove this force and apply a lateral force of F2 horizontally at a
point 25 mm from either the front or rear of the saddle and maintain this force for 1
min, whichever produces the greater torque on the clamp (see Figure 48). The forces
are given in Table 31.

The fixture shall be such that it does not damage the surface of the saddle.

Table 31 — Forces on saddle
Force in N
Type city and young adult mountain-bicycle racing-bicycle
trekking bicycle bicycle

Vertical force,F 1 1000
Horizontal force,F 2 450

a) Vertical force b) Horizontal force

1 Minimum insertion-depth mark
2 Bicycle frame

Figure 48 — Saddle/seat-post: security test

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