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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 05-21-08, 10:02 AM   #1
suspension1
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Chainless Transmission

anyone have any thoughts on the pros and cons of a chainless bicycle. This site has a bolt on chainless transmission that works with a Shimano Nexus 7 speed hub. It appears in the animation that it will be dificult to remove the rear wheel when this transmission id in place. http://www.sussex.com.tw/index.html
Thank you for your comments.
Paul
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Old 05-21-08, 10:48 PM   #2
Torchy McFlux
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Nothing is more efficient than a chain drive.
Belt drive is closest, but still saps energy that could be going to drive the rear wheel. And a human can only put out 1/3 horsepower at best, so every loss is a big one.
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Old 05-22-08, 12:13 AM   #3
Tabor
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Originally Posted by Torchy McFlux View Post
Nothing is more efficient than a chain drive.
Actually, direct drive is more efficient.
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Old 05-22-08, 05:28 AM   #4
DieselDan
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You're right about changing a rear flat. I had a customer bring a shaft drive in for that reason. I replaced the tube with a thorn proof and installed a Tuffy liner. However, he was charged $15 labor instead of the usual $6.
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Old 05-22-08, 08:14 AM   #5
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Quote:
Originally Posted by suspension1 View Post
anyone have any thoughts on the pros and cons of a chainless bicycle. This site has a bolt on chainless transmission that works with a Shimano Nexus 7 speed hub. It appears in the animation that it will be dificult to remove the rear wheel when this transmission id in place. http://www.sussex.com.tw/index.html
Thank you for your comments.
Paul
Wikipedia has a fairly balanced article on the subject:
http://en.wikipedia.org/wiki/Shaft-driven_bicycle
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