Never see this before....

[Nvreloader]

Neat bike, would love to give it one ride...

Unique Buddy Bike! | eBay

In the history of cycling, there is probably no concept more intriguing and challenging than the “side-by-side” bicycle Buddy Bike. He acquired a patent on it, after which the Buddy Bike was produced in a small series in the 1980s.

www.ebay.com

Never see a derailleur mounted like this before: Look at the 4 th photo, Shimano Brand name.
Anyone have more info on this derailleur?
Tia,

 

[PCeBiker]

They didn't mount the derailleur properly, as illustrated in the instructions,..

The derailleur hanger is spring loaded and wants to orient itself in the position that they mounted it.
You have to rotate the hanger 180° counter clockwise to add spring tension to hanger and chain, and wrap the chain around the sprocket.

There's only a few sprocket teeth in the chain.

That's a bicycle put together to crash two people at the same time.

 

[BlackHand]

No info on the derailleur, but we had one of those bikes back in the 80's.

Fun to ride, but unwieldy. If there is much weight imbalance you have to ride at an angle to keep the center of gravity, then you have a really tight turning radius in 1 direction and a large radius in the other or you'll have pedal strikes.

 

[PCeBiker]

Those derailleurs had a hole in the hanger and a lot of frames at the time had a threaded hole near the axle mount to thread in a screw or small bolt to hold the hanger.

There's a Huge spring on the derailleur rotating the hanger clockwise.
I struggled with that damn type or derailleur many times.
There were no slotted axles to keep the hanger from rotating.

 

[BlackHand]

We had to re-straighten the right handlebar occasionally after taking people out on their first ride. Being the 'passenger' was actually harder than being the driver for most people.

I always thought that it should've been a 2x so 1 person could control the front derailleur and the other the rear derailleur - it would only enhance the experience.

 

[Art Deco]

We had to re-straighten the right handlebar occasionally after taking people out on their first ride. Being the 'passenger' was actually harder than being the driver for most people.

I always thought that it should've been a 2x so 1 person could control the front derailleur and the other the rear derailleur - it would only enhance the experience.

Seems like it would "enhance the experience " of putting the chain back on ... again.

 

[PCeBiker]

,.. Being the 'passenger' was actually harder than being the driver for most people.

It looks like you should be able to flip the steering to the other side for people in Europe that drive on the wrong side of the road ??

 

[Tom@WashDC]

Wonder why it hasn't caught on?

 

[Chargeride]

Those derailleurs had a hole in the hanger and a lot of frames at the time had a threaded hole near the axle mount to thread in a screw or small bolt to hold the hanger.

View attachment 187922


There's a Huge spring on the derailleur rotating the hanger clockwise.
I struggled with that damn type or derailleur many times.
There were no slotted axles to keep the hanger from rotating.

Yes it was a dropout shaped threaded insert, I've actually got that very derallieur on bbshd build because its built like a brick pighouse.

 

[Nvreloader]

Chargeride
I was thinking the same thing, maybe adding one to my trail riding bikes, sage brush eats derailleurs.

Does this derailleur use a thumb type shifter or a twister shifter,
I have found some new ones in 6-7 speed models.
I am still looking for the 8/9 speeds.
Tia

 

[PCeBiker]

Does this derailleur use a thumb type shifter or a twister shifter,
I have found some new ones in 6-7 speed models.
I am still looking for the 8/9 speeds.
Tia

I remember them from the days before twist and thumb shifters, and before indexed shifting as well.

We just had 10-speeds (so 5-speed cluster) and used the derailleur stoppers to keep the chain on the sprockets.
You had to fiddle with the shifter levers to get the chain to stop clattering when it got hung up between gears.

Those derailleurs might work with indexed shifters if the amount of cable movement per gear is correct for the derailleur?
I'm not sure if the derailleur can take up enough slack if there is some Huge sprockets on the cluster, or if it would get hung up on something on an 8 or 9 speed cluster?