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Old 09-24-06, 03:18 PM
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cerewa
put our Heads Together
 
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Join Date: Jun 2003
Location: southeast pennsylvania
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Bikes: a mountain bike with a cargo box on the back and aero bars on the front. an old well-worn dahon folding bike

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not the body of [a semi truck] which nowdays is made out of mostly fiberglass
Load-bearing parts such as the frames, wheels and driveshafts of semi trucks are steel. The body-panels, which cover stuff up just for rain protection/aerodynamic/visual reasons, are a different story.
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