Page 34 - 20190101 part 6 (EN)

Annex C
(informative)

Suspension frames — Tyre-clearance test

C.1 Suspension frames — Tyre-clearance test

C.1.1 Requirements

When tested by the method described in C.1.2, the tyre or any components other than fixing mechanism
shall not contact the frame nor shall the components separate.

C.1.2 Test method

For the tyre-clearance test, a suspension frame and wheel shall first be checked and adjusted according
to the items listed in the following:

a) inflate the tyre to the maximum inflation pressure;

b) if the frame’s suspension element can be locked, place it in the open position;

c) if the frame’s suspension element is a pneumatic shock, pressurize the chamber to the minimum
pressure according to the manufacturer’s instruction.

Secure the frame in an orientation that allows a force to be applied to the wheel from a simulated ground
plane. With a wheel and tyre assembly fitted to the frame, apply a force of 2 800 N to the wheel in a
direction perpendicular to the simulated ground plane such that the suspension is compressed (see
Figure C.1). Maintain the force for 1 min.

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