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-   -   Designing an Urban Mule E-bike (http://www.bikeforums.net/electric-bikes/858245-designing-urban-mule-e-bike.html)

magic carpet 03-04-13 08:22 AM

Quote:

Originally Posted by troysmith80 (Post 15314572)
Yes, i love the moulton design. This looks a lot like it. Not as much of a trellis design. Although it is sort of a mixte, with the seat stays running parallel all the way to the head tube.

Here's the latest version of the design, now it looks perhaps more like an Enfield Revelation:
http://img.photobucket.com/albums/v6...pse0f51342.jpg

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The long seat tube is a weak point on the Moulton. I had to reinforce mine.

Why not spread the top and down tubes where they meet the head? Then you could lose the oogli gusset.

troysmith80 03-11-13 06:08 PM

The reason i haven't spread the head tube joint is because that would increase the angle of the top tube. I don't want to do that because 1-I don't like the look as well, and 2-it reduces the ease of step-through. I kind of like the look of the gussets, they add a couple more curves to the frame.

magic carpet 03-18-13 10:32 AM

Quote:

Originally Posted by troysmith80 (Post 15374247)
The reason i haven't spread the head tube joint is because that would increase the angle of the top tube. I don't want to do that because 1-I don't like the look as well, and 2-it reduces the ease of step-through. I kind of like the look of the gussets, they add a couple more curves to the frame.

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I see what you mean, but that will be a difficult junction to weld with 3 tubes and a gusset coming together in a small area. The top tube angle could stay the same if you made the seat stay angle more vertical and that would keep the seat post shorter, which as I mentioned, is a weak point.


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