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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 02-15-04, 03:00 AM   #1
william
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quadcycle

hello.
i'm a french man so excuse me for my bad english
i must to build a quadricyle for my son who's aged to 5 years.
i want to make a system similar like this
http://www.pedalcoupe.com/images/gallery/gears_t.jpg
i have a probleme with the freehub.
how i must to do, i want when the fixed gear turn the rear weels turning and when the crankset stop the rear wheel going to turn always?
how do you fix the rears wheels?
Have you some schematics or pictures or others things to help me.
i thank you in advance.
William
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Old 02-15-04, 12:16 PM   #2
Retro Grouch 
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Couple of things to think about.

1. You're only going want to drive one rear wheel. If you try to drive them both without some kind of differential, it won't turn very well.

2. A BMX freewheel, which is an easily obtainable stock item, will solve your coasting problem. You'll just have to machine something on your drive axle to thread it onto.
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Old 02-17-04, 06:23 AM   #3
william
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I thank you Retro Grouchdo
Do you know how can i to make a differential ?
See you soon
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