Tyres and wheels. Tyres. General Method of test for measuring tyre uniformity

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

15-05-1999

Publisher

British Standards Institution

Specifies test methods carried out under controlled conditions for verifying uniformity of tyres for passenger cars, commercial vehicles and motorcycles.

This International Standard specifies test methods carried out under controlled conditions for verifying the uniformity of tyres for passenger cars, commercial vehicles and motorcycles.

NOTE Lack of uniformity around a tyre produces variations in forces applied by the tyre to the vehicle and this influence is repeated with each revolution of the tyre. At the present state of the art, however, it is impossible to manufacture perfectly uniform tyres. A rigid control of the complete manufacturing process can only minimise the unavoidable imperfections of materials, components and processes affecting uniformity.

Methods for measuring the geometrical run-out of the tyre in both radial and lateral directions are covered, as well as methods for measuring the following parameters:

radial force variation;
lateral force variation;
ply steer;
conicity.

Not all of these measurements will necessarily be relevant in every situation.

This International Standard does not include methods for measuring the static and the dynamic unbalance nor methods related to tyre-wheel assemblies.

The test methods specified in this International Standard are not intended for the gradation of tyres or the definition of quality levels.

Committee	AUE/4
DevelopmentNote	Also numbered as ISO 13326. Supersedes 97/700853 DC. (05/2005)
DocumentType	Standard
Pages	20
PublisherName	British Standards Institution
Status	Current
Supersedes	97/700853 DC : JAN 97

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