Stretch-e-bicycle phase 1

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reikiman's picture
Last seen: 1 year 1 month ago
Joined: Sunday, November 19, 2006 - 17:52
Points: 8447
Stretch-e-bicycle phase 1

I've been working on and off for a long time on a stretch bicycle I want to use for cargo (around town shopping etc). The bicycle frame is one I've had for a long time, bought it in 1997 to install a Zap DX electric assist kit on it. FWIW that wasn't my first electric bicycle, that happened in 1995 (also a Zap DX kit).

In any case as you'll see this time around with this frame I'm doing a radical chop and rebuild. One reason is I've been reading plans from Atomic Zombie (DIY bicycle guides - Atomic Zombie's Bicycle Builder's Bonanza) and wanted to do one. I had this frame left over, so why not. I also had this xtracycle frame extension I really want to use.


That's the same bike frame, unmodified, with the xtracycle frame attached, there was no chain to crank the pedals with, and the wilderness energy BD36 hub motor I currently have on my Electra Townie. The picture is from late March 2007. The xtracycle carries four bags of groceries, a useful benchmark ...


Here's an early picture in the current version. The hub motor in front this time is a 48v Crystalyte (25A controller). I chopped out the bottom bracket, welded a battery tray, and did some struts to hold the tray in place. I'd also messed up the seat tube some time back and you'll see in a minute that's lead to an odd way of mounting a seat.


Some detail on an intermediate stage of the center area.


Here I've welded on a couple struts for the rear end of the battery tray going up to the seat tube.


Here's detail on the rear struts. It also shows how the seat is going to be mounted. I did this today and haven't cleaned up the welds yet. It's just a couple brackets with a place to mount the seat.


The battery tray has a grill in the bottom to hold the batteries.

amberwolf's picture
Last seen: 7 years 9 months ago
Joined: Monday, December 31, 2007 - 03:19
Points: 35
Re: Stretch-e-bicycle phase 1

No pedals? You must be in a lucky area where they're not required to remain a bicycle-class vehicle, unlike me (in AZ). :)

Are you going semi-recumbent with the seat? It'd probably be more comfortable, especially if you no longer have pedals to deal with.

Michael Elliott
Cybernetic Necromancers, Discorporated
Phoenix, AZ
Watch me build an electric-assisted recumbent bike from recycled junk:

reikiman's picture
Last seen: 1 year 1 month ago
Joined: Sunday, November 19, 2006 - 17:52
Points: 8447
Re: Stretch-e-bicycle phase 1

At the moment the seat is as pictured and the bike isn't running yet but sitting on the seat with those comfort handlebars the setup feels pretty comfortable and the seat is a teensy bit lower and teensy bit further back than usual. It might be nice to have a seat with a back.

I just ordered brake parts so I can finish assembling the bike.

kevin smith
kevin smith's picture
Last seen: 9 years 9 months ago
Joined: Monday, December 29, 2008 - 04:57
Points: 446
Re: Stretch-e-bicycle phase 1

look bloody heavy.!!

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