Go Back  Bike Forums > Bike Forums > Utility Cycling
Reload this Page >

wheel location for Hauling dog

Utility Cycling Want to haul groceries, beer, maybe even your kids? You don't have to live car free to put your bike to use as a workhorse. Here's the place to share and learn about the bicycle as a utility vehicle.

wheel location for Hauling dog

Reply

Old 11-17-07, 04:40 AM
  #1  
77dan77
Newbie
Thread Starter
 
Join Date: Nov 2007
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
wheel location for Hauling dog

Hi everyone,

I am building an electric bike and trailer but am not sure what diameter wheels to use on the trailer. It is so I can take my dog to the park on the weekend without having to drive.

These are the plans so far.

I can experiment moving the wheels forward or backward to balance out the tipping effect, this is okay.



I was thinking of using a 16" (400mm) wheel, something like this:


Will the trailer tip over easy in a sideways direction [with a 16" (400mm) wheel]?
Or should I increase the diameter of the wheel, say 20" (500mm), and run the axle over the top of frame using a bracket like this? (I can make this bracket)


It is not a major problem to use the bracket setup, because my dog likes to stand while in transport, she enjoys riding in my ute with her head out the side. But I would still have to pad over the axle in case she decided to lay down, and of course it will be awkward/uncomfortable.

Last edited by 77dan77; 11-17-07 at 05:19 AM.
77dan77 is offline  
Reply With Quote
Old 12-03-07, 12:39 AM
  #2  
kevbo
Senior Member
 
Join Date: Oct 2007
Posts: 330
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
I use a burley kid carrier to take out dogs to the park. Sometimes with my solo, sometimes with our tandem. It works OK, but I have had some thoughts on how I'd change it if I were building a trailer for that purpose.

The problem with a dog hauler is that a standing dog has a much higher center of gravity than a seated kid. Also, when turning, most of the dogs weight can be thrown to the outside, and this certainly happens if (when!) the trailer starts to tip over. Bottom line is that stability is much more of a problem with a dog trailer, than with a kid trailer.

The center of gravity needs to be ahead of the axle, otherwise the trailer will be really trying to turn itself around backward. If you balance the trailer so that it has 10% of the total weight on an axle hitch, or maybe 7% on a seatpost hitch, it should be fine.

The 20" wheels on our Burley seem big enough. It would be better if the floor were 3-4" below the axles. Look at many of the DIY designs on the web to see how this can be done. The through axle has the advantage of forcing the wheels to be paralell, but rules out using standard bicycle wheels. If you use larger than 20" wheels, lowering the floor becomes very important. The wheel track (width) needs to be more than the dog needs for stability, but limiting the enclosure is OK, as this keeps him from shifting outward in turns.

Finally, come up with a decent kickstand or center stand. This is very handy when loading the dog, and having a trailer attached can really limit your leaning options.
kevbo is offline  
Reply With Quote
Old 12-03-07, 06:57 AM
  #3  
HandsomeRyan
Pants are for suckaz
 
HandsomeRyan's Avatar
 
Join Date: Mar 2007
Location: Mt. Airy, MD
Posts: 2,578

Bikes: Hardtail MTB, Fixed gear, and Commuter bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Princess thinks that you have a good lookin' dobe there.

As for the trailer- do you have to use a solid axle? what about a design more like this:
HandsomeRyan is offline  
Reply With Quote
Old 12-03-07, 12:48 PM
  #4  
Leigh_caines
Senior Member
 
Leigh_caines's Avatar
 
Join Date: Sep 2007
Location: Woolgoolga NSW Australia
Posts: 275

Bikes: Long Recumbent, Short recombent, racing bike, MTB, beach bike,Tandem,Fixy.2 twentys and a folding bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Go with BMX 20 inch wheels as there are more around and easy to get tyers
Slope the wheels in at the top and you'll never turn it over
Leigh_caines is offline  
Reply With Quote
Old 12-03-07, 12:55 PM
  #5  
Leigh_caines
Senior Member
 
Leigh_caines's Avatar
 
Join Date: Sep 2007
Location: Woolgoolga NSW Australia
Posts: 275

Bikes: Long Recumbent, Short recombent, racing bike, MTB, beach bike,Tandem,Fixy.2 twentys and a folding bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you use BMX wheels with thicker axles [just bolt in each side]
slop the wheels like I did on this trike
Happy building

Leigh_caines is offline  
Reply With Quote
Old 12-03-07, 01:02 PM
  #6  
HandsomeRyan
Pants are for suckaz
 
HandsomeRyan's Avatar
 
Join Date: Mar 2007
Location: Mt. Airy, MD
Posts: 2,578

Bikes: Hardtail MTB, Fixed gear, and Commuter bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Is that trike front wheel drive and front wheel steering? how does that work when going around corners?
HandsomeRyan is offline  
Reply With Quote
Old 12-03-07, 01:36 PM
  #7  
yes
Senior Member
 
Join Date: Feb 2006
Posts: 675
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Make her lay down while rolling or do something like Ryan's plan. We use a converted Burley 20", and rolling is an issue w/ the dog.
yes is offline  
Reply With Quote
Old 12-05-07, 12:00 AM
  #8  
Leigh_caines
Senior Member
 
Leigh_caines's Avatar
 
Join Date: Sep 2007
Location: Woolgoolga NSW Australia
Posts: 275

Bikes: Long Recumbent, Short recombent, racing bike, MTB, beach bike,Tandem,Fixy.2 twentys and a folding bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yes
front wheel drive
turns well
3speed with a coaster brake
Girl has no use of her legs so we made her one she can peddle by hands
Leigh_caines is offline  
Reply With Quote
Old 12-09-07, 02:35 AM
  #9  
77dan77
Newbie
Thread Starter
 
Join Date: Nov 2007
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
wow, thanks everyone for your posts.
I will go for the 20" wheels. I shall see how they go with normal bolts, if I need too I will swap it for a tilted wheel design.

I might try use a plastic tub with my current design. The plastic tub would look like this (but more heavy duty) (ignore the trailer, just look at the tub);


image: rocknrollskwurlo

This way I can still keep the design simple, and the tub can lift out for cleaning. I can't really weld any tube up, I am an aluminum person. I might just put the bolts through the frame, and the tub will lower the finished floor 3-4" below the axle like kevbo suggested.

HandsomeRyan thanks for the photos, if only dogs could see 2 dimensional pictures!

I shall post some pictures for everyone at a later date...thanks again.
77dan77 is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service