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TBIS 15194:2019

4.3.11 Front mudguard
4.3.11.1 Requirements


If front mudguard is fitted, when tested by the method described in the two-stage
tests in 4.3.11.2 (for mudguard with stays) or 4.3.11.3 (for mudguard without stays),
the front mudguard shall not prevent rotation of the wheel or shall obstruct the
steering.


4.3.11.2 Front mudguard with stays test methods

4.3.11.2.1 Stage 1: Test method – Tangential obstruction

Insert a 12 mm diameter steel rod between the spokes, in contact with the rim and

below the front mudguard stays as shown in Figure 35, and rotate the wheel to apply
a tangentially-upward force of 160 N, against the front mudguard stays and maintain
this force for 1 min.


Remove the rod and determine whether or not the wheel is free to rotate and
whether or not any damage to the front mudguard adversely affects wheel rotation

(blocking of the wheel) and the steering.















Figure 35 — Front mudguard: tangential obstruction test






























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