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 Post subject: shaft drive
PostPosted: Sun Jul 08, 2007 11:43 am 
BoTM Winner
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anyone seen these new designs , biomega , shaft driven

nice and clean looking , like the bamboo one

£750 for the normal framed version

whadya think ??


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 Post subject:
PostPosted: Sun Jul 08, 2007 11:49 am 
East Midlands AEC
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why has shaft driven never taken off for single speeding? Also would it be that difficult to set up some sort of gearing at the BB end to make it multi-geared?

does the shaft drive run up the inside of the chainstay?


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 Post subject:
PostPosted: Sun Jul 08, 2007 12:13 pm 
BoTM Winner
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as far as i can tell , yes , up the chainstay


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PostPosted: Sun Jul 08, 2007 12:38 pm 
King of the DuckBoard
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:shock: WOW i like. But why is nobody selling??


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 Post subject:
PostPosted: Sun Jul 08, 2007 2:19 pm 
BoTM Winner
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they are ........

http://www.biomega.dk/biomega.aspx


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PostPosted: Sun Jul 08, 2007 3:07 pm 
East Midlands AEC
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so they do have gears - so is it just too leading edge currently?


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 Post subject:
PostPosted: Sun Jul 08, 2007 3:32 pm 
Retro Guru
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Well, it's been around a couple of decades, but so far never took off. It's a bit like the motorcycles by BMW: don't they use a shaft as well? I don't see why it wouldn't work on a bike, but maybe it has to do with weight and maintenance.


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PostPosted: Sun Jul 08, 2007 4:50 pm 
Retro Guru
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Shaft drive bicycles have been around for 100 years or more. During that period there have always been a few on the market.

Although they offer some advantages in simplicity and cleanliness, there is one decided disadvantage.

A chain drive is the most efficient power transfer known. A shaft drive requires the power to be turned through a right angle twice, with a resulting loss of efficiency.

The competitive nature of cycling revealed that these bikes could not be made to go as fast as chain drive bikes, so their market is limited to those who don't mind a slower bike in exchange for keeping grease off their hands.


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PostPosted: Sun Jul 08, 2007 5:22 pm 
BoTM Winner
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think they are aimed more at the "yuppie" market , sort of a fashion accessory

the cleanliness of the non chain drive being one of the selling points


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PostPosted: Sun Jul 08, 2007 6:12 pm 
East Midlands AEC
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you'd think they's use them on downhill bikes where chains/rings/cogs etc just get in the way and pedalling efficiency and/or weight aren't the highest priority?


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