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Convert A Child Bike trailer To A Sidecar?

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Convert A Child Bike trailer To A Sidecar?

Old 06-28-24, 11:27 PM
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Sidecar?Convert A Child Bike trailer

Does anyone have any ideas on converting a child trailer to a sidecar? I picked up a kid trailer for next to nothing and would like to take my dog(s) out on a ride because the pavement can be too hot in the summer. I like the idea of a sidecar over towing a trailer so I can keep better tabs on my dog and be able to communicate with him sitting next to me.
I could use one of my MTB but not adverse to buying a cruiser to mount it to. The mounting seems to be the biggest concern
I could get rid of the cover and mount a cut down used plastic barrel or similar as a passenger compartment
The trailer looks pretty much like this one.


Maybe on this bike, Fisher Aquila


you can almost anything on the internet... Something similar to this



Last edited by Desert Ryder; 06-29-24 at 08:43 PM.
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Old 06-29-24, 02:34 AM
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Danger Will Robinson. A sidecar is subjected to much greater loads than a simple trailer. A sidecar keeps the bike and the rider from falling over. Also note that with a motorcycle sidecar, it is sufficient weight to keep the bike planted and from falling over in the other direction, but that definitely can happen if cornered too fast in the direction of the sidecar. And, a sidecar prevents the bike from banking in turns either way, so the front tire and fork experience *sideload* much more than usual; Look carefully at the fork on a sidecar equipped motorcycle, it will probably be a leading-link fork, stronger.

Last edited by Duragrouch; 06-29-24 at 02:37 AM.
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Old 06-29-24, 11:19 AM
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Meh...I'll accept the risks. I don't think I'll be leaning into turns while cruising the bike paths with my dog onboard.
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Old 06-29-24, 05:57 PM
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So keep in mind you will now be taking up a lot more space and many of the concerns that Duragrouch suggested.

A "Meh...I'll accept the risks" seems to be a poor proposition for your pups as they are also being stuck accepting the risks. You willl note that bicycle sidecars do not exist commercially in any real capacity. I have never seen one but something homebrew and there is good reason for that. Trailers make more sense they are going to be safer for the passengers and also take up a little less space width wise.

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Old 06-29-24, 09:25 PM
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I will add:

If you have a sidecar that is not rigidly attached to the bike, but has instead, the floor of the sidecar attached to low pivots on the bike frame, and spaced out far enough, that the bike can lean in turns, and the low attachment means the sidecar will not exert as much lateral pull on the frame in turns, that may work dynamically. However, to do so, you would need to attach the pivots at the bike rear axle and have the sidecar axle line up fore/aft with the bike rear axle for proper steering geometry (easy), but have the front pivot be at the bike bottom bracket (difficult, due to interference with crank arm, not an issue on motorcycles). Further back on the chainstays, insufficient "spread" of attachment points. 1' + in front of the bottom bracket to clear crank and pedal and foot, possible, but would involve a frame strut projecting forward as noted, and down from the downtube for bracing. Also, any weight of the sidecar at the pivots, because they are not at bike lateral centerline, will cause the bike to try to fall over in the direction of the sidecar.
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Old 07-02-24, 08:49 PM
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See C&V:

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Old 07-02-24, 09:15 PM
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Originally Posted by flangehead
Well that's pretty much how I envisioned one as noted above. I didn't think there would be room on the chainstays alone without the front link interfering with the crank arm, but looks like there is, probably helped by long chainstays. EDIT: I see now the bracket on the bike extends well aft of the rear axle.

Also note, that is not a single wheel sidecar, but 4 wheels so has its own stability. However, the front buggy wheels will "scrub" while trying to negotiate tight turns, fighting the bike steering. EDIT: Oh no! A lever lifts the front wheels on the buggy (front when attached to the bike), possibly also the inside rear wheel. Somebody was thinking.

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Old 07-02-24, 10:17 PM
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flangehead - I saw that clip also. Thanks for posting.

My trailer doesn't have 4 wheels and I don't plan on using the front trailer wheel or arm.
A couple of lateral arms mounted to the chainstay....
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Old 07-11-24, 07:04 PM
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Moot point now....sold the trailer...
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Old 07-11-24, 08:15 PM
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Originally Posted by Desert Ryder
Moot point now....sold the trailer...
"It's a moo point." "A moo point?!" "Yeah, y'know, like a cow's opinion, it doesn't matter. It's moo." - Joey, Friends.
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Old 07-11-24, 10:07 PM
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Originally Posted by Duragrouch
"It's a moo point." "A moo point?!" "Yeah, y'know, like a cow's opinion, it doesn't matter. It's moo." - Joey, Friends.
You really need to hear it from Joey for it to make sense....

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Old 07-11-24, 10:16 PM
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Originally Posted by Desert Ryder
Moot point now....sold the trailer...
Yes... But think of how many variations you built in your mind as you scratched out a plan. Yep... That's called Engineering Entertainment... Ha
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Old 07-11-24, 10:42 PM
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Originally Posted by Desert Ryder
You really need to hear it from Joey for it to make sense....
Matt's timing, waiting for gaps between audience laughter, is masterful. Unless canned laughter was added post-production, but I think it was filmed live.
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