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THREE FACTS OF TYRE LIFE

16th June 1967, Page 54
16th June 1967
Page 54
Page 54, 16th June 1967 — THREE FACTS OF TYRE LIFE
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Which of the following most accurately describes the problem?

By a Special Correspondent

THE facts of tyre life . how clearly I are they understood hy operators? the growing popularity of tyre protectors proves that maximum safe usage is an ideal. But there are some staggering cases Of neglect through lack of information.

Take the snap-in Valves or :tubeless tyres.

When tubed tyres were commonplace, valve replacement came autoinatically with tube replacement or as a tube repair. But since tubeless tyres have become general neither the trade nor operators have paid sufficient attention to replacing the snap-in valve when a Worn tyre is replaced.

Yet replacement of the old valve is vital in the interests of safety and performance because this depends on an airtight seal at the hole in the wheel rim through which the valve projects.

These comparison pictures of a new valve (left) and old valve show clearly that the old valve has lost its elasticity. Its diameter at sealing-point is noticeably less. In use, it would produce a sloW leak.

Tyre valve manufacturers A. Schrader's & Son have taken the initiative In highlighting the danger. And the Tyre Manufacturers Conference is co-operating.

Repair of tubeless tyres?

The National Tyres Distributors Association—alarmed by a County Court award of £900 damages against a member—has warned the trade that a simple plug repair is merely a temporary expedient and that it must not be used on its own. It should be accompanied by vulcanized patching.

Which, of course, also constitutes a warning to operators.

Tyre protectors?

One manufacturer alone—Moplant (Industrial) Ltd., of Wood Street, Cardiff —reports that hundreds of thousands of its PR tyre protectors are in use on goods vehicles, buses and on industrial and municipal (more than 50 local authorities) plant and equipment.

They almost completely eliminate


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