ISO 4209-2-2020 pdf download.Truck and bus tyres and rims (metric series)一 Part 2: Rims. The rim dimensions are those rim contour dimensions necessary for mounting and fitment of the tyre to the rim. Tyre designations, dimensions and load ratings are given in Iso 4209-1. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3911, Wheels and rims for pneumatic tyres — Vocabulary, designation and marking ISO 4000-2, Passenger car tyres and rims — Part 2: Rims 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 3911 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.org/obp — IEC Electropedia: available at http://wwwelectropedia.org/ 4 Designation and marking The rim shall be designated by its nominal rim diameter code and nominal rim width code (e.g. 17.5 x 5.25), and rim flange type when specified (for example: 16 x 6 K). 5 50 tapered (drop-centre) rims 5.1 Rim flange Recommended rim flange contours for K rims are given in Table 1. Refer to Iso 4000-2 for B and J contour rims. 5.2 Rim contours The dimensions and tolerances of the rims shall be as given in Figurel and Tablesi… 2, and 4. 5.3 Rim diameter and hump circumference The specified rim diameter, D, for the appropriate nominal rim diameter code and the hump circumferences are given in Table 4. 5.4 Valve holes 5.4.1 Valve hole edges on the tyre side of rim shall be rounded or chamfered. 5.4.2 Valve hole edges on the weather (external) side of the rim shall be free from any burrs that could damage the valve. 5.4.3 To provide for adequate sealing, an unbroken, smooth inside surface having at least 0,75 mm or 25 % of rim thickness, whichever is greater, shall be maintained. 5.4.4 Suitable valves shall be used. Valve hole details for snap-in valves shall be as shown in Figures 3 and 4 for rims with 17,3 mm minimum well depth.ISO 4209-2 pdf download.
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