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Trailer for 70lb dog mount to carbon frame thru axle?

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Trailer for 70lb dog mount to carbon frame thru axle?

Old 09-30-22, 08:06 PM
  #1  
sean.hwy
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Trailer for 70lb dog mount to carbon frame thru axle?

We adopted a puppy last friday. He is guesstimated to be about 70lbs. I purchased a trailer for him, it arrived today. Assembly went fine. After I filled both tires up one of them popped :/

How do I mount this trailer to my carbon Ibis gravel bike with thru axels. Looks like this trailer was meant quick release.

Is there a way to mount this trailer safely to my bike?

Buy a longer thru axel?

I want to mount some how on the bottom chain stay buy my hydraulic brake line is there. if I move forward past the brake line seems like the trailer is too close to my rear tire.

Is it safe to mount it on thin carbon bar that goes from the seat to the rear wheel? Seems to thin to me for that.

Buy an alloy hybrid bike ?

Buy a different trailer that has a better way to mount to the carbon bike with hydraulic brakes ?




Last edited by sean.hwy; 09-30-22 at 08:12 PM.
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Old 09-30-22, 08:14 PM
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https://robertaxleproject.com/bob-trailers/
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Old 09-30-22, 08:17 PM
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I’ll bite…

Is the trailer even rated for 70 lbs.?

And why would you buy a trailer without checking for attachment compatibility?
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Old 09-30-22, 08:18 PM
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I've got no advice on the trailer...But that is a sweet old Datsun in the first photo. Looks like a 260z.
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Old 09-30-22, 08:27 PM
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Originally Posted by Koyote View Post
I've got no advice on the trailer...But that is a sweet old Datsun in the first photo. Looks like a 260z.
thanks.

1972 240z

Used to be heavy into classic cars. That all stopped once I started biking. Now they just collect dust. ha-ha
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Old 09-30-22, 08:29 PM
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Originally Posted by indyfabz View Post
I’ll bite…

Is the trailer even rated for 70 lbs.?

And why would you buy a trailer without checking for attachment compatibility?
110 lbs

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Old 09-30-22, 08:29 PM
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Originally Posted by Atlas Shrugged View Post
thanks
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Old 09-30-22, 08:39 PM
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Originally Posted by sean.hwy View Post
thanks
I thought I would just answer the question and not make you run the usual BF gauntlet of snarky comments, scolding and other inane comments.
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Old 09-30-22, 08:59 PM
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Sweet Z!!! Did Robert Axle have anything?
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Old 09-30-22, 09:26 PM
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Originally Posted by cxwrench View Post
Sweet Z!!! Did Robert Axle have anything?
Do you guys still spend money on your other hobbies once you started biking? lol My 240z and LS El Camino need some $$ <3 but it's just more fun, less expensive and better for my health when I dump time and $$ into the bikes.


yes, I think I need this one.

https://robertaxleproject.com/produc...mount-trailer/


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Old 09-30-22, 09:28 PM
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Originally Posted by Atlas Shrugged View Post
I thought I would just answer the question and not make you run the usual BF gauntlet of snarky comments, scolding and other inane comments.
ha-ha ha-ha


And I really appreciate that sooo much.

I actually did try and do some research but I did not get any response.
https://www.bikeforums.net/utility-c...avel-bike.html

If you want to see a picture of the puppy.
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Old 09-30-22, 09:35 PM
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I got that trailer from Costco when they briefly had it. Much better price. I put a 75 lb Golden Retriever in it, and he flipped the trailer, and the bike (with quick release), and me. Fortunately I realized I needed to cut my losses before I ordered a thru-axle from the Robert Axle Project, which we would have needed for hooking this thing up to an e-bike.

The trailer is rated for that weight, but the reality is that the dog has to be very sessile or it will quickly become a hazard.

Fortunately, Costco was good about taking it back.
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Old 09-30-22, 09:37 PM
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MTBR forum has all sorts of dog/rider threads, advice, etc.
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Old 10-01-22, 02:16 AM
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Originally Posted by Polaris OBark View Post
The trailer is rated for that weight, but the reality is that the dog has to be very sessile or it will quickly become a hazard.
He's currently 13lb 10 week puppy. Hopefully if I start him young he will be ok when he is older. At least that's the plan. Might ended up only last two weeks. We will see.

Looking forward to when he gets a little older and I can take him hiking.
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Old 10-01-22, 07:50 AM
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You need to take some pictures of the 240Z and post them in the 'Beautiful Cars' thread in the 'Foo' forum.

FWIW: There was a business here in town that bought old Japanese cars from the 60s and 70s, fixed them up, then exported them to Japan. The Datsun 'Z' cars were the most sought after, and a 240Z with the carbureted engine (first two years of production IIRC) was worth its weight in gold on the Japanese collector market. Japanese motorcycles were also prized, I believe the Honda 650(?), the original 'big bike' was also a top moneymaker.
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Old 10-03-22, 06:00 AM
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Originally Posted by sean.hwy View Post
He's currently 13lb 10 week puppy.
I'm confused. I thought you wrote that he's 70 lbs.
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Old 10-03-22, 06:22 AM
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Originally Posted by indyfabz View Post
I'm confused. I thought you wrote that he's 70 lbs.
I think that's what he's supposed to grow into when full-sized.
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Old 10-03-22, 06:58 AM
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My sister-in-law had a trailer like this when her children were younger, and I think it had some kind of special bracket or something which connected to the bike, then you connected the trailer hitch to that. I don't remember for sure, and they sold the trailer years ago so I can't check. Her kids are all riding bikes of their own now.
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Old 10-03-22, 10:17 AM
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Originally Posted by Milton Keynes View Post
My sister-in-law had a trailer like this when her children were younger, and I think it had some kind of special bracket or something which connected to the bike, then you connected the trailer hitch to that. I don't remember for sure, and they sold the trailer years ago so I can't check. Her kids are all riding bikes of their own now.
I would have thought there was some kind of bracket also. I kind wonder how much stress on the frame there's going to be on just a tiny little thru axel area.
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Old 10-03-22, 10:19 AM
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Originally Posted by indyfabz View Post
I'm confused. I thought you wrote that he's 70 lbs.



He's currently 13lb 10 week puppy that is guesstimated to be about 70lbs ish when full grown.
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Old 10-03-22, 10:36 AM
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Since the axle is so expensive I only want to buy one of them. Should I buy it for Blur MTB bike or the Ibis gravel bike? I can't imaging ever going fast with a trailer even if it was empty and I was not worried about the safety of the dog.




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Old 10-03-22, 10:39 AM
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Originally Posted by sean.hwy View Post



He's currently 13lb 10 week puppy that is guesstimated to be about 70lbs ish when full grown.
The screen shot reads that he is guesstimated to currently be about 70 lbs. Hence my question about the trailer weight rating. "To reach 70 lbs." or something similar would have worked.
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Old 10-03-22, 11:03 AM
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This is going to take a little bit of creativity or custom work. That Robert axle is something I've never seen, but it looks hopeful.

I have two bike trailers. They're both made by Burley. One is from the 1990s, designed for carrying children, and similar to yours (except for the hitch). The other is of more recent manufacture and designed for cargo, with a hitch more similar to what you have. Neither of them would work well with every possible style of axle and brake, but there are always workarounds. I know that isn't really much help.

I'd say you could safely attach the trailer hitch to your chain stay, if you also fabricate an extension to the trailer's arm, to make clearance for the bike wheel. One thing to watch closely before attempting this solution is your heel clearance. Your chain stays are not very long, and anything you attach forward of the axle and brake could interfere with your pedaling.

You could also perhaps attach it to the seat stay, but will have to keep the attachment point as low as possible, so the trailer rides level.

The important thing in either case will be to protect the carbon fiber frame from damage due to chafing or localized pressure/stress. Even a thin structure like the seat stay can take quite a bit of force on it, but could be easily damaged by direct contact with metal parts or by rubbing/scraping. Again, that extended through-axle might be your best bet.

If I were choosing between those two bikes for towing a trailer, I'd probably go with the mountain bike. It likely has geometry that will work better for this purpose, and I suspect will be more comfortable for the type of ride you will do while towing your pup around. It's really up to you, though. Either one could feasibly go well, assuming the axle extension works.

If you're planning on riding steep hills, you should take the bike's gearing into consideration. Towing a ~70 lb. dog plus the weight of the trailer itself is not easy. I have hauled about that much weight behind a few different bikes. It is doable, but it adds a new dimension to the biking experience.

Last edited by Broctoon; 10-03-22 at 11:10 AM.
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Old 10-03-22, 11:15 AM
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Originally Posted by Broctoon View Post
This is going to take a little bit of creativity or custom work. That Robert axle is something I've never seen, but it looks hopeful.

I have two bike trailers. They're both made by Burley. One is from the 1990s, designed for carrying children, and similar to yours (except for the hitch). The other is of more recent manufacture and designed for cargo, with a hitch more similar to what you have. Neither of them would work well with every possible style of axle and brake, but there are always workarounds. I know that isn't really much help.

I'd say you could safely attach the trailer hitch to your chain stay, if you also fabricate an extension to the trailer's arm, to make clearance for the bike wheel. One thing to watch closely before attempting this solution is your heel clearance. Your chain stays are not very long, and anything you attach forward of the axle and brake could interfere with your pedaling.

You could also perhaps attach it to the seat stay, but will have to keep the attachment point as low as possible, so the trailer rides level.

The important thing in either case will be to protect the carbon fiber frame from damage due to chafing or localized pressure/stress. Even a thin structure like the seat stay can take quite a bit of force on it, but could be easily damaged by direct contact with metal parts or by rubbing/scraping. Again, that extended through-axle might be your best bet.

If I were choosing between those two bikes for towing a trailer, I'd probably go with the mountain bike. It likely has geometry that will work better for this purpose, and I suspect will be more comfortable for the type of ride you will do while towing your pup around. It's really up to you, though. Either one could feasibly go well, assuming the axle extension works.

If you're planning on riding steep hills, you should take the bike's gearing into consideration. Towing a ~70 lb. dog plus the weight of the trailer itself is not easy. I have hauled about that much weight behind a few different bikes. It is doable, but it adds a new dimension to the biking experience.
What kind of bikes do you use to tow your trailers and how far do you go? If the axle was $10 I would just buy one for each bike. At $60 I kind of only want to buy one.
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Old 10-03-22, 11:22 AM
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I contacted the vendor. Inner tube on it's way. going to take a few weeks with free shipping.
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