Tried and tested

As well as the independent testing carried out on Wheelsure’s device in 2004 the results of which can be viewed above, tests were carried out in 2007 by the Fraunhofer Institute in Germany – Europe ‘s largest organisation for applied research. Tests were carried on a Biaxial Wheel Test Machine (ZWARP), a well-known industry standard for many OEMs, the European Wheel Association (EUWA) and Society of Automotive Engineering ( SAE ).

The accelerated life testing carried out applies both vertical and lateral forces simultaneously to reproduce the road-like operational conditions which often cause wheel nut loosening. Comparative tests were also carried out using ordinary wheel nuts, which were retorqued both at the beginning and during the tests. However, the bolts fitted with the Wheelsure locking device were not retorqued at all.

The conclusions reached by the researchers were that “both for new as well as for used bolts the nut locking devices were proven to offer technical capabilities to prevent unintentional bolt loosening effectively even without retorque after initial loading,” and that the device “indicates a clear improvement compared to unlocked bolts.” Fraunhofer Institute

Wheelsure products are truly unique and are already being specified and used by leading fleets for whom wheel loss is a real operational challenge.

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