What have I acquired here?!! (Oversized OPC)

[gowjobs]

I picked up a Free Agent Chromoly one-piece crank, and this thing is BIG. I mean, it's only 175mm in arm length, but I'm pretty sure it's drilled to accept 9/16 pedals, and no standard front sprocket will even slide down the length of the crankarm without real force being applied, and the threaded area is WAY to big to get it over, even on the non-drive side. If I could find a bottom bracket and a sprocket to make it work, I'd run it on my build-off entry, but for now I'm afraid it's just a squarish-cross-sectioned paperweight.

Anybody know what I should be searching for to make it work, or even better have the parts? Failing that, does anybody need one of these?

 

[gowjobs]

Adding a pic.

 

[Captain Awesome]

Is the chainring location by chance 22 or 24mm? I know redline had the monster cranks in 1pc, but free agent is new by me

 

[horsefarmer]

https://ratrodbikes.com/forum/threads/redline-big-bock-bottom-bracket.113500/#post-1172149

 

[RustySprockets]

It's a neat item, but you're clearly facing some fabrication here. A machine shop could likely enlarge the center hole in a chainring, but do you have the matching cones for that crank? It would seem apparent that run-of-the-mill OPC parts won't fit that.

 

[Captain Awesome]

Let me know if you want to part with it

 

[horsefarmer]

I got the my Redline crank from a scrapped bike, so it came complete with chainring bearings and cups.
The cups are std OPC size outside, but bearings are oversize dia so the bearings are not standard, and ditto for the cups. I gather that you can find the cranks and can bore a std sprocket to fit. You could use loose balls for bearings but the cups are not obtainable.

 

[gowjobs]

That's kind of what I was thinking. If I can't find cones and cups, I'm out of luck.

@Captain Awesome , I'll send to you for cost of shipping.

BTW: double-checked, and they use 1/2" pedals, but there's plenty of meat there if somebody wanted to drill/tap for 9/16".

 

[Pauliemon]

Free Agent is still around and they have a one piece crank. I don't think it's the same crank though.

 

[Captain Awesome]

That's kind of what I was thinking. If I can't find cones and cups, I'm out of luck.

@Captain Awesome , I'll send to you for cost of shipping.

BTW: double-checked, and they use 1/2" pedals, but there's plenty of meat there if somebody wanted to drill/tap for 9/16".

If you can't find anything send me a pm and we can discuss