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 ASME HPV Racing
 Front Wheel Drive: Chain Idler Position
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copria
Starting Member

USA
21 Posts

Posted - 02/13/2014 :  12:45:58  Show Profile  Reply with Quote
I was wondering if anyone had any dimensions or design criteria on the appropriate position for chain idlers on a front wheel drive system for a bicycle.


Edited by - copria on 02/13/2014 13:05:12

sbocher
Starting Member

USA
11 Posts

Posted - 02/14/2014 :  10:06:42  Show Profile  Visit sbocher's Homepage  Reply with Quote
I think the main concern is steering feedback when you are pedaling. The side of the chain that is under tension should be as parallel as possible with the steering axis to minimize the moment.
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alevand
human power expert

USA
2840 Posts

Posted - 02/15/2014 :  15:44:58  Show Profile  Visit alevand's Homepage  Reply with Quote
Also it should be a steel sprocket as large as practical.

C:
Tony Levand
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Speedbiker
human power expert

USA
3678 Posts

Posted - 02/16/2014 :  10:14:12  Show Profile  Reply with Quote
Yes, the bigger the better. Some very fast bikes use aluminum or even plastic. While durable, I don't know anyone who uses steel.
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