Page 9 - 20190101 part 7 (EN)

TBIS 4210-7:2019

Cycles — Safety requirements for bicycles —

Part 7:

Wheels and rims test methods

1 Scope

This part of TBIS 4210 specifies wheel and rim test methods for TBIS 4210-2.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

TBIS 4210-1, Cycles — Safety requirements for bicycles — Part 1: Terms and
definitions

TBIS 4210-2, Cycles — Safety requirements for bicycles — Part 2: Requirements for city and trekking,
young adult, mountain and racing bicycles

TBIS 4210-3, Cycles — Safety requirements for bicycles — Part 3: Common test methods

3 Terms and definitions

For the purposes of this document, the terms and definitions given in TBIS 4210-1 apply.

4 Test methods

4.1 Rotational accuracy

The run-out tolerances represent the maximum variation of the position of the rim when measured
perpendicular to the axle at a suitable point along the rim (see Figure 1 and Figure 2) (i.e. full indicator
reading) of a fully assembled and adjusted wheel during one complete revolution about the axle without
axial movement. Both sides of the rim shall be measured and the maximum value shall be taken as result.

For city and trekking, mountain, and young adult bicycles, the measurement of both axial run-out (lateral)
and radial run-out (concentricity) shall be done with a tyre fitted and inflated to the maximum inflation
pressure, but for rims where concentricity cannot be measured with the tyre fitted, it is permissible to
make measurements with the tyre removed.

For racing bicycles, the measurement of both axial run-out (lateral) and radial run-out (concentricity)
shall be measured at the same time as shown in Figure 2 and a tyre is not required to be fitted.

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