Long wheel base front box cargo bike

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1000w
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Long wheel base front box cargo bike

Post by 1000w » Jul 03, 2012 4:12 am

I'm keen to be able to carry two kids plus gear up in front of me with an ebike and I want to build the frame myself. I have also been keen to try out my new tube notcher and my tig on steel.
So after looking around the net for frame ideas, I spotted CETMA Cargo bikes, http://cetmacargo.com/CETMACargoHello.htm.
I like the style, size, steel frame and the fact I can use a ladies mountain bike for the rear section.
I only want around 30 to 35km max with plenty of torque so this one will be powered by a rear 12 turn Mac and LiFePo4 from Cellman.
I did a really basic sketch from pictures on the CETMA site.

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I went to the local tip and bought two donor bikes, one ladies mountain bike for the rear end and one for the extra chain stays.
These photos show the extra chain stays welded in.

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I also doubled the rear dropouts up, this bike is going to be heavy and have precious cargo.

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These next photos show the 50mm bottom tube and 38mm head tube welded in.

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I had a visit at Aussie Jester's today and I borrowed his tube roller, it did a sweet job on the 50mm main bottom tube.

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More to come soon.

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AussieJester
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Re: Long wheel base front box cargo bike

Post by AussieJester » Jul 04, 2012 12:01 am

:shock: Surprised there hasnt been more comments on this Matt! this is
one practical bike for anything from, daily errands to the shops and/or lazy sunday
rides carrying the kids up front...as always its already looking very professional
you attention to detail is always evident.. keep up the good work shall be watching
enthusiastically for updates! best of luck buddy :-)

KiM

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Re: Long wheel base front box cargo bike

Post by Farfle » Jul 04, 2012 12:04 am

Damn, this is almost exactly what I want to do with my cargobike im building. Will have to mix some ideas around when I get my paycheck and start building.
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Re: Long wheel base front box cargo bike

Post by Gregory » Jul 04, 2012 12:18 am

I'd like a cargo bike too.
A friend in white gum valley has a Bakfeits, and the owner of the painted fish in freo has one similar. Beautiful but really expensive.

I'm sure yours will be great.


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Re: Long wheel base front box cargo bike

Post by Samd » Jul 06, 2012 8:05 am

Nice Going!

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Re: Long wheel base front box cargo bike

Post by Cargo_Tom » Jul 07, 2012 9:53 am

Sweet build so far. That cargo bed will be a full 8 inches longer than on my vintage longjohn bike. you will have tons of space :D

Have you settled on the specifics of the cargo area build yet?

If not there is additional inspiration to be found here:
http://www.longjohn.org
http://www.larryvsharry.com/

Cheers
-Tom

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Re: Long wheel base front box cargo bike

Post by Gregory » Jul 07, 2012 7:42 pm

And Metrofiets have some very good looking cargo bikes too

http://www.metrofiets.com/


1) x5305 Hub Motor in a 24" Sun rim with 10G spokes, Kelly 72601 controller, 74V 10Ah Turnigy LiPo 20C Battery and CycleAnalyst
2) Mac 10T rear hub in a 700C "comfort bike" 15S 5Ah LiPo, stock 28A Xie Cheng controller
3) 38" Longboard, Turnigy 6374, CC Mamba XL2 ESC

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Re: Long wheel base front box cargo bike

Post by nechaus » Jul 07, 2012 11:52 pm

Have you been tig welding for long?
your welding looks A+++

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Re: Long wheel base front box cargo bike

Post by Samd » Jul 09, 2012 6:20 am

How's the build coming along? Envious...

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Re: Long wheel base front box cargo bike

Post by 1000w » Jul 09, 2012 10:19 am

Thanks for all the positive feed back guys, much appreciated.
Cargo_Tom wrote:Have you settled on the specifics of the cargo area build yet?
I've got 850mm on the sketch for the length, but I think I will make it 900mm x 600mm as this is half a standard sheet of ply wood.
The cargo area will be very similar to the CETMA bike with a box like this http://cetmacargo.com/sa26.jpg
Thanks for the links Cargo_Tom, some excellent bikes there.
Gregory wrote:And Metrofiets have some very good looking cargo bikes too
http://www.metrofiets.com/
Thanks Gregory these are the ones that first got me interested.
nechaus wrote:Have you been tig welding for long?
your welding looks A+++
Thank you, however I've seen a lot better welds by other people. I have been MIG welding on and off since school metal work classes, about 25 years.
As far as TIG welding goes, I did some on the job training about 15 years ago for about 7 months and then started up again recently when I bought my own AC/DC TIG machine.
Samd wrote:How's the build coming along? Envious...
I'm waiting for the sand blaster shop to clean the back end up and then there will be more fab work.
Cheers all.

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Re: Long wheel base front box cargo bike

Post by 1000w » Jul 29, 2012 9:28 am

In the last week I have made some good progress with the frame fabrication, it is basically finished apart from the steering and the stand.
The frame feels very strong and not too heavy.
Here are the latest photos.

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Re: Long wheel base front box cargo bike

Post by Timma2500 » Jul 29, 2012 9:48 am

Looks great Matt! Very neat bends and welding :mrgreen:

Cromo tubing? Looks strong, good trianglation.

I'm looking forward to seeing this on a group ride when the weather warms up :wink:


Paul :D
Norco Aline / carbon fibre frame mod / 12t Mac / 12fet / 23kg

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Re: Long wheel base front box cargo bike

Post by 1000w » Jul 29, 2012 9:58 am

Cheers Paul, it's just 1.6mm mild steel.
I'll definitely bring it out on the next group ride.

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Re: Long wheel base front box cargo bike

Post by veloman » Jul 30, 2012 1:26 pm

That looks SOLID. Nice work.
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Re: Long wheel base front box cargo bike

Post by spinningmagnets » Jul 30, 2012 5:18 pm

I was skeptical at first from the sketches, but after this recent pic I can safely say you do very good work...and its a good design, worthy of copying. I would not hesitate to pay you to make a bike frame for me.

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Re: Long wheel base front box cargo bike

Post by 1000w » Aug 04, 2012 2:42 am

Thanks for the kind words guys.
spinningmagnets wrote:I was skeptical at first from the sketches
I probably would have been as well, that was a really simple sketch just to show the layout. I mainly worked by measuring the many photos of the CETMA bikes that are posted on flickr.
I purchased a sheet of 12mm marine ply and cut the deck sheet out.

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I had to modify the front forks, these are BMX forks that had huge 14mm axle slots and I need 9mm for my axle.
I filled the slots then re cut them and added some retaining blocks for extra safety.

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I also had to make and attach disc brake caliper mounts on the front and rear.

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In this photo you can also see some panel beating on the rear stays that allows a 203mm disc to fit.

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Note the black 12 turn Mac from the awesome vendor CellMan.

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More to come soon.
Cheers,

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Re: Long wheel base front box cargo bike

Post by 1000w » Aug 25, 2012 9:57 pm

Since the last update I have made the double kickstand, rear rack and front box.
I did a rough install of the electrics and did some test rides and everything seems to work, powder coating is next and the final stain and oil of the box is needed.
The bike rides great and the kids loved it.

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Re: Long wheel base front box cargo bike

Post by agniusm » Aug 26, 2012 5:33 am

Hi, me planning to build one as well. What was the head tube angle you went for? What is overall length of the bike? So far i came out at 2.6meters and thought it might be too long?

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Re: Long wheel base front box cargo bike

Post by 1000w » Aug 26, 2012 8:55 pm

agniusm wrote:Hi, me planning to build one as well. What was the head tube angle you went for? What is overall length of the bike? So far i came out at 2.6meters and thought it might be too long?
This bike is 2.7m long and the head tube angle is 22deg from vertical.

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Re: Long wheel base front box cargo bike

Post by MattyCiii » Aug 26, 2012 9:02 pm

Awesome cargo bike!
Reminds me of this one - very functional!
http://fixedgeargallery.com/contest/gro ... dMahan.htm
1st build: Dahon Jetstream folding bike. Quick, reliable, capable of 32mph. Light enough to lift, folds for easy transport by car/bus/train.
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3rd build (just started): Scratch build ultimate utility bike. Based on a common power module using a NuVinci left side freewheel.

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Re: Long wheel base front box cargo bike

Post by AussieJester » Aug 26, 2012 9:07 pm

Fantastic result Matt, have to be pretty damn happy with that!!!
What colour powdercoat you going with ?

KiM

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Re: Long wheel base front box cargo bike

Post by 1000w » Aug 27, 2012 2:51 am

MattyCiii wrote:Reminds me of this one - very functional!
http://fixedgeargallery.com/contest/gro ... dMahan.htm
Nice work there!
AussieJester wrote:What colour powdercoat you going with ?
Hey Kim, I'm going for a white frame, black wheels etc and dark stained box, like this one, http://cetmacargo.com/sa5.5.jpg

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Re: Long wheel base front box cargo bike

Post by Dee Jay » Aug 27, 2012 6:32 am

be still, my heart... :o

that's a truck load of battery space :D

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Re: Long wheel base front box cargo bike

Post by Danny Mayes » Aug 27, 2012 6:35 am

Hey Matt,

Neat job, it looks super cool.

i am very jealous.

I think you have started something and there will be a lot more of these springing up in Perth over the coming years...

D

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Re: Long wheel base front box cargo bike

Post by amberwolf » Aug 28, 2012 1:23 am

I've been pondering one, too, for some time. Mine will not likley be as neat as yours. :lol: But any technical info you can stick in a single summary post (perhaps editing it into the first post) about the frame's measurements, angles, materials, etc., would be helpful to all of us that want to copy your successful design.... :) (says the man that has yet to do any of this for any of his own builds.... :oops: )

That is, after you have successfully tested it with an overload of cargo in the box there. ;)

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