Page 82 - TBIS_15194-2019_(EN)_3nd

TBIS 15194:2019

4.3.9 Wheels and wheel/tyre assembly
4.3.9.1 Wheels/tyre assembly – Concentricity tolerance and lateral tolerance

4.3.9.1.1 Requirements

When measured by the method described in 4.3.9.1.2, the run-out shall not exceed
the values which are given in Table 22.

Table 22 — Wheel/tyre assembly – Concentricity and lateral tolerance
Dimensions in millimetres
Type city and young mountain-bicycle racing-bicycle
trekking adult
bicycle bicycle

Concentricity ntended for

and lateral rim-brakes
0.8 0.6
tolerance Not intended
for rim-brakes

4.3.9.1.2 Test method

The run-out tolerances represent the maximum variation of position of the rim when
measured perpendicular to the axle at a suitable point along the rim (see Figure 31-1)
(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 bicycle ， young adult bicycle and mountain-bicycle
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 31-2 and a tyre
is not required to be fitted.

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