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rim manufacturer recommends a maximum tyre inflation pressure, it shall be clearly and permanently
marked on the rim and also specified in the manufacturer’s instructions.

NOTE It is recommended that the minimum inflation pressure specified by the tyre manufacturer also be
permanently marked on the side wall of the tyre.

4.11.3 Tyre and rim compatibility

Tyres that comply with the requirements of ISO 5775-1 and rims that comply with the requirements
of ISO 5775-2 are compatible. The tyre, tube, and tape shall be compatible with the rim design. When
inflated to 110 % of the maximum inflation pressure, determined by the lower value between maximum
inflation pressures recommended on the rim or the tyre, for a period of not less than 5 min, the tyre shall
remain intact on the rim.

NOTE In the absence of suitable information from the above-mentioned International Standards, other
publications can be used. See References [9] and [10].

4.11.4 Tubular tyres and rims

Tubular tyres shall be compatible with the rim design. Instructions for the correct gluing technique
shall be given in the bicycle or the wheel assembly instructions of the manufacturer’s instructions [see
Clause 5 item v)].

4.11.5 Rim-wear

In the case where the rim forms part of a braking system and there is a danger of failure due to wear, the
manufacturer shall make the rider aware of this danger by durable and legible marking on the rim, in an
area not obscured by the tyre [see Clause 5 item u) and 6.2].

NOTE A symbol referring to the instruction manual is an acceptable marking for rims for wear.

Where the rim is made of composite materials, the manufacturer shall include in the manufacturer’s
instructions warnings of the danger of rim failure caused by wear of the braking surfaces.

4.11.6 Greenhouse effect test for composite wheels

4.11.6.1 General

This requirement is to ensure wheels made from composite materials that are subjected to high
temperature conditions (i.e. such as car storage in direct sunlight) do not suffer concealed damage that
could subsequently affect the safety performance of the wheel during normal use.

4.11.6.2 Requirement

When a fully assembled wheel made of composite material, fitted with the appropriate size tyre and
inflated according to the lower value between maximum inflation pressure recommended on the rim or
the tyre, is tested by the method described in TBIS 4210-7:2017, 4.4, there shall be

— no failure of any of the components of the wheel,

— no tyre separation from the rim during the test,

— no increase in rim width greater than 2 % of the initial maximal width value,

— compliance of lateral and concentricity tolerance according to 4.10.1,

— compliance of tyre and rim compatibility according to 4.11.3, and

— compliance of static strength according to 4.10.3.

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