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Why
Should I Replace My Tubes? Who Says So?
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| Reuse
Of Tubes |
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| A new tube should be used when installing
a new tire. Tubes grow in service, taking a permanent set of
about 25% larger than the original size. This makes a used tube
too large to use in a new tire, which could cause a wrinkle and lead
to tube failure. Source: Goodyear Tire
Care & Maintenance Guide 09/98 |
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| Used
Aircraft Tubes |
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Aircraft tubes are made of natural rubber
and are made slightly undersize, so they will fit easily into a new
tire. Aircraft-tire plies are made of nylon, and will "grow"
slightly in service. The tube will also grow, and will eventually
take a permanent set to the (now) larger inside-tire dimension.
If this now-larger tube is later put into a new tire, it may be too
large for the inside-tire cavity, with the result that the tube may
have folds in it. In service, these folds may eventually wear
through and destroy the tube's ability to hold air. A slow wearing
through will result in a slow leakage of air, and the pilot will be
alerted to the problem before it becomes too serious. However,
if the tube is torn in a particular takeoff, the tire will probably
go flat in mid-air, without the pilot having realized what is wrong.
Considering the risks in reinstalling a used innertube, we recommend
a new tube installed in a new tire. Source:
Specialty Tire Product Guide
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