1 The following method is to be used for testing the wheel attachment of a carriage or stroller:
(a) mount a wheel and axle in a test fixture as illustrated in the figure;
(b) apply a force of 450 N to the axle, as illustrated in the figure, at a rate of loading not exceeding 450 N/min;
(c) maintain the force for a period of two minutes;
(d) reduce the load to zero at a rate not exceeding 450 N/min;
(e) note whether the wheel has become detached or suffered loss of function; and
(f) repeat the steps set out in paragraphs (a) to (e) for each of the other wheels of the carriage or stroller.
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