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ISO 5751-2-2010 pdf free download
ISO 5751-2-2010 pdf free download.Motorcycle tyres and rims (metric series) Part 2:Tyre dimensions and load-carrying capacities
Pneumatiques et jantes pour motocycles (series millimetriques) — Partie 2: Cotes et capacités de charge des pneumatiques.
4.3 Other markings
For tyres having a nominal rim diameter code of 16 MJC or higher, the suffix MIC is not required if the tyre was manufactured before May 2003.
Extra-load version tyres shall be additionally marked either Extra Load or REINF (for reinforced).
5 Tyre dimensions
Tables 1 to 14 present the
a) tyre size designation,
b) measuring rim width code,
c) design tyre dimensions. i.e. section width and overall diameter, and
d) maximum tyre dimensions in service, i.e. overall width and diameter for the various types of tread configuration (see Clause 6) to be considered by vehicle manufacturers in designing for tyre dearances.
NOTE The maximum dimensions in service do not include the values of the centrifugal radius (see ISO 5751-1).
5.2 Measuring procedure
Mount the tyre on a chosen rim according to ISO 5751-3, approved for the respective lyre size and ready for fitting. Inflate as follows.
a) For normal-load version tyres:
— 225 kPa for speed symbols S” and lower:
280 kPa for speed symbols T” and higher.
b) For extra-load version tyres:
– 280 kPa for speed symbols P” and lower;
330 kPa for speed symbols Q’ and higher.
C) For light-load version tyres: 175 kPa.
Allow the tyre to stand for 24 h at normal room temperature, then readjust the inflation pressures to those specified in a), b) and C), before performing the measurements.
When measuring on rims having a rim width code that differs from that of the measuring rim width code given in the tables of this part of ISO 5751, the section-width and overall-width values of the tyre used for comparison with the data given in Tables 1 to 14 shall be adjusted as follows:
U’ Wm + 0,4 (R – Rm)
U is the value measured;
Rm is the width, expressed in millimetres, of the rim used for the measurements;
R is the width, expressed in millimetres, of the measuring rim width code given in the tables.
6 Tread configurations
ISO 5751-1 :—, Figure 1, shows various tread configurations. The following attributions of tread-type configurations to the type of service are to be considered as examples only. The choice of a given tread-type configuration for a given lyre is at the discretion of the tyre manufacturer alone.
Tread type A is commonly adopted for highway-service low-speed tyres;
— tread type B is commonly adopted for highway-service high-speed tyres;
— tread type C is commonly adopted for tyres used in both on- and off-road service; tread type 0 is commonly adopted for tyres exclusively in off-road service.
7 Load ratings
Tables 15 to 29 show the standardized maximum lyre load-carrying capacity for each given lyre size designation.ISO 5751-2-2010 pdf free download.
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