Why

[DieselTech]

All I got what u see in the pics. Customer dropped it off says it don't turn

I personally feel the pitch is right, but the chain width is wrong. New chain is too narrow/thin.

 

[tombenn444]

Tried with multiple chains with same result

 

[darwin]

Bike Chain Size Guide And Chart

If you are ready to replace your bike’s chain, you need to know the chain’s size and details. Read the article to learn more about the bicycle chain sizes chart and size guide.

www.statecyclist.com

 

[Risk Man]

The chain for a derailleur is a different size than for a standard free wheel. But I guess you know that.

 

[tombenn444]

This thing is all kinds of Slapped together. I'm pretty sure this bike didn't have a 26"x 2.125 back wheel. Or a derailer or a five gear freewheel. But it does. I even offered to give the customer a practically new wheel tube and tire but he's gonna be all " I think I'll keep the original on there." But..nothing on here....not even the rust...is original...

 

[Chainlube]

This thing is all kinds of Slapped together. I'm pretty sure this bike didn't have a 26"x 2.125 back wheel. Or a derailer or a five gear freewheel. But it does. I even offered to give the customer a practically new wheel tube and tire but he's gonna be all " I think I'll keep the original on there." But..nothing on here....not even the rust...is original...

That chain ring doesn't go on that bike, some PO frankensteined that bike long ago. It was probably dug out of the thrash.

 

[Sidewinder Jerry]

Options are change the chainring, change the 5 speed freewheel to a double freewheel or change the hub to an IGH.