Cycling Weekly

Industry divided over new tyre rim-size regulations

Unbeknown to most, a Brusselsbased organisation called the European Tyre and Rim Technical Organisation, or ETRTO, has been debating the safety of hookless rims and compatible tyres. And their decision could impact your ride.

Made up of experts from wheel and tyre manufacturers, the ETRTO committee is responsible for producing the recommended safety standards on all aspects of vehicle wheel rims and tyres.

ETRTO’s new standard states that there should be a minimum of a 5mm overlap between the internal measurement of a rim and the size of the tyre fitted to it. This

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