EN 14766:2005 - 64_e_stf - Baltik vairas

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EN 14766:2005 (E)4.10 Wheels and wheel/tyre assemblies4.10.1 Rotational accuracy4.10.1.1 GeneralRotational accuracy shall be as defined in ISO 1101 in terms of axial run-out tolerance (lateral). The run-outtolerances given in 4.10.1.2 and 4.10.1.3 represent the maximum variation of position of the rim (i.e. full indicatorreading) of a fully assembled and adjusted wheel during one complete revolution about the axle without axialmovement.For measurement of both axial run-out and radial run-out (concentricity) the wheel shall be fitted with a tyre inflatedto the maximum pressure as moulded on the tyre but, for rims where concentricity cannot be measured with thetyre fitted, it is permissible to make measurements with the tyre removed.4.10.1.2 Wheel/tyre assembly – concentricity toleranceFor wheels intended for rim-brakes, the run-out shall not exceed 1 mm when measured perpendicular to the axle ata suitable point along the rim (see Figure 38).For wheels not intended for rim-brakes, the run-out shall not exceed 2 mm.4.10.1.3 Wheel/tyre assembly – lateral toleranceFor wheels intended for rim-brakes, the run-out shall not exceed 1 mm when measured parallel to the axle at asuitable point along the rim (see Figure 38).For wheels not intended for rim-brakes, the run-out shall not exceed 2 mm.4.10.2 Wheel/tyre assembly – clearanceAlignment of the wheel/tyre assembly in a bicycle shall allow not less than 6 mm clearance between the tyre andany frame or fork element or a mudguard and its attachment bolts.Where an off-road bicycle has a frame or a fork with a suspension system the clearances shall be measured withthe appropriate suspension system compressed to the limit specified by the manufacturer (see also 4.9.3).4.10.3 Wheel/tyre assembly – static strength test4.10.3.1 RequirementWhen a fully assembled wheel fitted with a tyre inflated to the maximum pressure as permanently marked on thetyre is tested by the method described in 4.10.3.2, there shall be no failure of any of the components of the wheel,and the permanent set, measured at the point of application of the force on the rim, shall not exceed 1 mm.4.10.3.2 Test methodClamp and support the wheel suitably as shown in Figure 39 and apply a static force of 370 N at one point on therim, perpendicular to the plane of the wheel. Apply the force once only for a duration of 1 min.In the case of a rear wheel apply the force from the sprocket side of the wheel as shown in Figure 39.62
EN 14766:2005 (E)Key1 Clamping fixture2 Wheel/tyre assembly3 Drive sprocketsFigure 39 — Wheel/tyre assembly – static strength test4.10.4 Wheel retention4.10.4.1 GeneralWheel retention safety is related to the combination of wheel, retention device, and drop-out design.Wheels shall be secured to the bicycle frame and fork such that when adjusted to the manufacturer'srecommendations they comply with 4.10.4.2, 4.10.4.3, 4.10.4.4 and 4.10.5.Wheel nuts shall have a minimum removal torque of 70 % of the manufacturer's recommended tightening torque.Where quick-release axle devices are used they shall comply with 4.10.5.4.10.4.2 Front wheel retention – retention devices secured4.10.4.2.1 RequirementWhen tested by the method described in 4.10.4.2.2, there shall be no relative motion between the axle and thefront fork.4.10.4.2.2 Test methodApply a force of 2 300 N distributed symmetrically to both ends of the axle for a period of 1 min in the direction ofthe removal of the wheel.63
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EN 14766:2005 - 64_e_stf - Baltik vairas

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