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Old 05-20-2004, 09:58 AM   #1
GiorgioXT OP
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Question Fiberglass tanks : experiences?

Experiences & adices about fiberglass tanks?
I had only one - a french-made 20 litres that still sit on my XT500 from 1984 ..but I got a lot of critics from mechanics that stands for aluminium ones ... but alu tend to crack...
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Old 05-20-2004, 03:50 PM   #2
Davo
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There both good.

Metal bends Fiberglass shatters. Metal=good
Metal rusts, fiberglass doesnt. Fiberglass=good

Other considerations. wieght, painting.
I prefer my aluminium tank but only because it came with the bike and the Touratech 41l is so expensive. If it were free i would be just as happy with a fiberglass tank.
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Old 05-20-2004, 03:57 PM   #3
Frank Warner
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Err as far as I know Touratech tanks are plastic not fiberglasss.

Fiberglass tanks were popular on the spanish bikes of the '70s. They had a thick 6mm? skin on the outer surfaces that could hit things in a fall. So they were unlikly to shatter.

Every material has it weak points, chose your failure method?
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Old 05-20-2004, 04:13 PM   #4
Davo
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shows im not up with the times!

Sorry i was being a little generic in my answer. I'll shut up now
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Old 05-20-2004, 04:46 PM   #5
Frank Warner
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Failure modes for plastic tanks
UV hardening
Gouging by rocks
Stress fractures .. usuall around the mold points.

Failure modes for aluminium tanks
stress fractures .. vibration points.. (more subsectable to this than steel..)
Gouging by sharp rocks .. or excessive bending by the same rocks

Failure modes for steel tanks
stress fractures .. vibration points..
Excessive bending by the sharp rocks
Rust!

Failure modes for fiberglass tanks
stress fractures .. vibration points..
Gouging by sharp rocks .. or excessive bending by the same rocks
UV hardening

They all can fail along the seem lines.. manufacturing defects ..
I think those are the main ones. Any others?

----
Basicly any tank can be good .. it depends on the quality of the product.
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