IAT C.:RISIS? shrugged a bland Jim Callaghan when as Prime Minister
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he returned from a visit to America and was asked about delicate economic situation that had arisen in Britain. His reply quickly passed into the anthology of political boomerangs.
Commercial-vehicle manufacturers are equally dismissive when pressed on the subject of wheel security. They refuse to admit the possibility of a problem, although operators know differently. Recommended torque settings for wheel nuts made from similar materials and used at similar axle loads vary widely. So do stipulated mileages at which torque should be checked after a wheel has been replaced. Why?
in the absence of agreed common recommendations by makers, die answer is perhaps to be found by a process of elimination as wheels drop off.