john
If it's heavily rusted, then I would replace, but otherwise it should
not fail.
In general, just like bridge, or bicycle spokes, If its steel, and makes
it over a million cycles (which takes 1000 miles for spokes), then it
will probably never break. (as long as the stress cycle doesn't increase,
and material doesn't otherwise degrade, e.g. rust..).
Safty factor on items like this are quite huge anyway. I would be mostly
concerned with connection points. Double check the connection of the rack
to the vehicle. Double check the connection of the rack to the bicycle.
But the rack itself, breaking? : unlikely.
Often times, just like bicycle frames, items are not designed around
strength anyway, but rather are designed around stiffness. Thus designing
to meet a stiffness criteria typically results in very large safety factors
on strength.
As always though, all statements are qualified with "it depends", and
"probably", and "maybe" and "possible" and "typically", " in general" etc
etc.
I also like to have redundancy when life and limb are on the line. So,
Where would it fail first? And if it does fail, will the bicycle go
flying? For example for a roof rack where the bike is mounted by removing
the front wheel and clamping the fork. If that failed, you would still
have the strap on the rear wheel. Right?
On Mon, Mar 18, 2013 at 7:46 PM, Jamie Mikami wrote:
> **
> So my bike rack is now over 14 years old. Should I start to worry about
> failure? It is a Thule and seems pretty sturdy, but things fail and would
> like to avoid my bike flying off at highways speeds to the suprise of the
> person behind me.
>
> Not sure if everyone else just replaces them every so often, I use to with
> each car, but well my current car is now 15 years old. Maybe I need a new
> car and rack ?
>
> Just thought I would throw this out there and see how I compare.
>
> Jamie
>
>
>
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