plastic

vaughn · June 2007

has anybody ever made a plastic framed mtb? they make all kinds of heavy industrial equipment out of plastic ; why not bikes?

Unknown · June 2007

Too flexy i would have thought.

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Unknown · June 2007

there have been a few plastic bikes. and you could class carbon bikes as plastic due to the resin.

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Vegeeta · June 2007

Many manufacturers do make plastic bikes... because as Nicklouse said, carbon fibre is essentially a plastic.

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Seagull · June 2007

Carbon fibre is entirely plastic, the resin is MDI based and the fibre is just strands of kevlar. Both of these are synthetic plastics.

Standard plastics wouldn't have sufficient rigidity for a given weight to be used in a bike and would cause excessive flex as the fibres are free flowing within the structure. Carbon fibre bonds the fibres to give a more rigid structure.

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Kestrel_daos · June 2007

^Being a chemeng does have it's good points [;)]

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Vegeeta · June 2007

Hmmm, I must remember that next time I moan at people for having plastic brake levers.... that I have plastic brake levers. Oh dear [:o]

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Seagull · June 2007

Not many though, who ever needed a chem eng to do home renovations etc. I have worked in plastic intermediates all my career and currently make intermediates for MDI, hence actually knowing about the subject. Sad, buts its one question I can answer quite well [:)]

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Seagull · June 2007

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Vegeeta

Hmmm, I must remember that next time I moan at people for having plastic brake levers.... that I have plastic brake levers. Oh dear [:o]
<hr height="1" noshade id="quote"></blockquote id="quote">

Don't worry, carbon fibre is a very expensive plastic; unlike standard plastic which will only cost a few pence to make. Carbon Fibre is a bugger to make and uses some seriously nasty chemicals to make it.

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Vegeeta · June 2007

Meh... where would we be if there wasn't someone here to tell us all about carbon fibre?
Probably all out talking about our rusty steel bikes I suppose [:D]

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Unknown · June 2007

How about a fibreglass bike?

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big_p · June 2007

gt made a pressure molded lts about 10 years ago http://www.mtbr.com/reviews/Bike/GT_STS-2.jpg the frame was inflated inside aluminum parts for the pivots, they were sold as being thermo plastic

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Unknown · June 2007

there was the scott endorphine hardtail as well.

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Seagull · June 2007

They must have been awful bikes, I really can't see normal plastic cutting it. I wouldn't like a fibre glass bike; when I was into kayaking I always remember seeing dead fibre glass boats at the side of rivers. One hit in the wrong place and it fails catestrophicaly.

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Unknown · June 2007

narr plastic bikes, to musc flexing going on and not good for jumps and drops, stick with the carbon fibre for the meen while,[^]

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StefanH · June 2007

Bikes that could feasibly be manufactured, but shouldn't, but would be funny/curious: -

1) Glass.
2) Concrete.
3) Paper.
4) Wicker.
5) Styrofoam.
6) Rubber.

BoingBoing · June 2007

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by StefanH

Bikes that could feasibly be manufactured, but shouldn't, but would be funny/curious: -

1) Glass.
2) Concrete.
3) Paper.
4) Wicker.
5) Styrofoam.
6) Rubber.
<hr height="1" noshade id="quote"></blockquote id="quote">

and...
7) Trifle


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Andy B · June 2007

We all know that some bike parts are made of cheese as standard, XTR chainrings for example...

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