Bicycle Mechanics - I really want to do this, but I need some help.

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.



PDA
wethepeople
12-01-05, 04:04 PM
http://img.photobucket.com/albums/v419/wethepeople101/other%20stuff/pbpic636446.jpg

A belt driven BMX. I have done a little bit of research, but not much has come of it. I was thinking about using a timing belt assembly for the drive system and milling it out to fit a casset hub and a bottom braket. I'm sure I could find a way to make all the spacing and such work, but i'm stumped on how to run the belt.

I have to somehow run it through the frame. In that photo it appears the frame has been cut then had a sleeve (clamp?) of some sort placed over the the spot on the frame. are there any good alternatives to this? Any other suggestions on what to use for the drive system other than a chain and sprocket (no shafts either)?

2manybikes
12-01-05, 04:20 PM
There's noithing particualry good about it. It will slow you down. The chain is the best all around answer.
supcom
12-01-05, 04:44 PM
If you used a brazed steel frame, you could remove one of the stays then reattach it after slipping it through the belt. Not a good maintenance plan though.

In reality, except as a curiosity, a belt is not as efficient as a chain. I feel confidant that every known power transfer mechanism has been tested for a bike and nothing has been found to be as efficient as the chain and sprocket.

jqnj
12-01-05, 04:47 PM
Ion propulsion. The Japanese are flying their exploratory space craft home from an asteroid with this technology so how hard can it be? Why not a chain? This has been the transmission for bikes since the stone age and I am guessing the best transmission as well.
Brian
12-01-05, 04:50 PM
To answer your question, you'll need to make a small roller/tension device on top of the right chain stay. Then you can run the belt over the stay. You'll need to remove the rear wheel to service the belt, but it's doable.
Eatadonut
12-01-05, 04:54 PM
To answer your question, you'll need to make a small roller/tension device on top of the right chain stay. Then you can run the belt over the stay. You'll need to remove the rear wheel to service the belt, but it's doable.

+1 - you beat me to it.


and as for the naysayers...I'm not sure you guys understand the point of a project like this. I'm pretty sure he's not going for maximum efficiency. Belt-driven is really cool. :D