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my new homemade expedition backpack bike trailer minimalist design

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my new homemade expedition backpack bike trailer minimalist design

Old 08-02-11, 07:03 AM
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my new homemade expedition backpack bike trailer minimalist design

https://www.youtube.com/watch?v=kMijy_3Gf8k

the latest version with new free axle design
for a bit of camber and always movable pivit point for dialed in tounge weight of 0 pounds!
for any load!!
the daisey chain stay has loops to add more gear underneath!
time to travell the world!
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Old 08-02-11, 08:29 AM
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Looks nice if you will be combining backpacking and touring. What does it weigh without the pack?
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Old 08-02-11, 07:55 PM
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Yeah, what does that weigh? It looks light.

Also, how much did all the supplies cost in the end? Doing some quick numbers in my head tells me this is probably a lot cheaper than buying a trailer.
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Old 08-02-11, 08:38 PM
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hey now will get a exact weight soon without wheels
but with the movable axle/pivit point you can get it to be 0 pounds on the tounge/hitch
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Old 08-03-11, 12:17 PM
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I want that, sell it to me.
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Old 08-03-11, 01:05 PM
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bdcain, if you come up with a price, i bet quite a few people would be willing to make arrangements for procuring that nifty trailer/bag hauler. myself included.
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Old 08-04-11, 06:16 AM
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If you are on a wet or slippery surface, putting some of the weight on the bike wheel instead of all weight on the trailer wheels might be a good idea. But I say that based on my engineering education, I have never ridden a bike with a trailer so I can't speak from experience. Any alternative opinions on that?
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Old 08-04-11, 07:09 AM
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Originally Posted by Tourist in MSN
If you are on a wet or slippery surface, putting some of the weight on the bike wheel instead of all weight on the trailer wheels might be a good idea.
I'd say that is probably true for any surface. It is nice to be able to dial in the tongue weight, but I don't think the goal should be zero.
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Old 08-04-11, 10:54 PM
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Zero weight on the hitch is going to give you big problems when coming down hill at speed with a loaded trailer.
The trailer will try to come past the bike on one side and then it will try to come past on the other side.
While it is swerving about you can straighten it out by going faster and faster [good luck with that]; if you brake- it will flip.
Any degree of control during descents needs at least 25% of the load bearing down on the hitch.
It's one of life's scariest moments; when a trailer gets a wobble-on and there is nothing you can do before the crash.
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Old 08-05-11, 07:45 AM
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When I made my comment against zero additional weight on the bike wheel (post 7 above) I was making that comment based on traction concerns, both accelerating and decelerating (braking). I recall in a college engineering course many years ago that we were calculating the loss of traction that a dump truck with a trailer has compared to a dump truck where the cargo weight was over the driving and braking wheels.

I had not thought about handling issues like this:

Originally Posted by Lou Skannon
Zero weight on the hitch is going to give you big problems when coming down hill at speed with a loaded trailer.
The trailer will try to come past the bike on one side and then it will try to come past on the other side.
While it is swerving about you can straighten it out by going faster and faster [good luck with that]; if you brake- it will flip.
Any degree of control during descents needs at least 25% of the load bearing down on the hitch.
It's one of life's scariest moments; when a trailer gets a wobble-on and there is nothing you can do before the crash.
Interesting.
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Old 08-05-11, 08:15 AM
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Yeah, you definitely want 1/4 to 1/3 of the total weight of the load forward of the axle, weighting the tongue. But your variable axle/pivot is still a good idea because you can put a load with a weird weight distribution on the trailer however you want, and compensate for it by adjusting the axle.
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Old 08-06-11, 04:41 PM
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maybee make a vid so you can dyi
takes about hour or less if you dont cut by hand
and good to know about the 0 % and down hill

although with large loads in lovetrain mode

https://www.youtube.com/watch?v=OlWZ-r3O_dA

i know how little it takes to have your tail push you thru

Last edited by bdcain; 08-06-11 at 04:46 PM.
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Old 08-06-11, 08:15 PM
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Originally Posted by mr geeker
bdcain, if you come up with a price, i bet quite a few people would be willing to make arrangements for procuring that nifty trailer/bag hauler. myself included.
Come up with a price. Start production when you've presold a hundred (or however many you need)

https://www.kickstarter.com/
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Old 08-06-11, 08:27 PM
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Originally Posted by kuan
Come up with a price. Start production when you've presold a hundred (or however many you need)

https://www.kickstarter.com/
I second that. Kickstarter is fantastic, and this is a perfect fit for it.
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Old 08-07-11, 06:50 AM
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A little tip about checking the bike's loaded weight while on tour. This works for trailers too.

Go into any large home improvement store and buy a bathroom scale. Go into the parking lot and weigh the bike and trailer, one wheel at a time; adding them together for overall weight.
Put the scale back in the box, find the receipt and take it back in the store for a complete refund.

Ideal for getting good weight distribution.
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Old 08-07-11, 08:08 AM
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Hey now the kickstarter thing looks cool but im a canadian eh!
it would of been cool was dreaming to make more refined units with less or more depending on the persons needs
the most fun/rewarding trailers are for the handicapped folk !
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Old 08-12-11, 02:58 PM
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My only suggestion would be a handguard so that babies don't get their hands caught in the spokes.

Beautiful design, though.
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