keeping them running
Page 63
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by Trevor Lon go roft
have just seen a puncture to a
-ansit van's 650-14.00 tyre :paired without the wheel ing removed: the vehicle was 3t even jacked up. The pair, not surprisingly, was mporary, made only to get the in out of trouble, and the test as arranged by Euro Dynamics d, 5 Bathhurst Street, Hyde irk, London W2. Their repair Wit will deal with relatively iall repairs to all types of bed or tubeless tyre up to 00-14.00 size. However. a .ge split in the tyre, or the
wheel rim seal being broken the case of tubeless tyres, II make repair impossible.
For the test a tyre was liberately punctured with a 'ewdriver — when it was ly deflated, a Repair'n Air cannister was connected to the tyre valve via a hose connection supplied.
This allowed Butyl rubberplastic sealant and compressed air to enter the tyre simultaneously, inflating the tyre and sealing the puncture. Then the van was immediately driven for 10min to complete the process. On the vehicle's return, the tyre was still inflated with no apparent evidence of airleakage.
As a further test the tyre was inflated from its repair pressure of 26 psi to its normal operating pressure — 45 psi. Hertz, the owner of the van, told me later that the tyre ran for a further 200 miles before the repair became ineffectual.