RRBBO13 OMF Coaster Brake Racer 2.0

[O’Curren Metal Farm]

I was going to start building this bike anyway, and you guys are having a build off, soooo... here’s the build of a simple mountain bike! Don’t worry, if I wanted simple triangles with straight tubes I’d go buy a Kona or something. I want a bike inspired by the sweet cruisers from back in the day, as interpreted by my crazy brain. Some of it is my design, some of it I let the universe resonate through the metal and guide me into designing itself.

 

[OddJob]

Welcome to RRB and the BO #13! Mine is a early mtb resto project, Fisher CR-7 1990. Looking forward to your build. RaT oN~!

 

[sdframe]

Looking forward to this.

 

[O’Curren Metal Farm]

Ok, make some sketches and scribbles and numbers and stuff, then set up the jig.

 

[O’Curren Metal Farm]

Um, not exactly in order, but there was roller action, and then fitting together puzzle pieces. Or filing together. Not much file, more flapper discs on the angle grinder. Yeah.

 

[O’Curren Metal Farm]

The pieces in first level mock-up. Much more technical eyeballin and grinding to go

 

[O’Curren Metal Farm]

Doesn’t look a whole lot different here, but a lot more fitting was done and the rear stays are sorta made. I think this was after first tacks holding together and all lined up.

 

[O’Curren Metal Farm]

Yeah buddy. It’s a thing with other things on it now. I got some silicon bronze rod. Never used it before but seems pretty cool. Probably should’ve practiced more with it before blob in all over here but hey, this is practice I guess.

 

[O’Curren Metal Farm]

Then today I welded the front triangle. Well minus the top tubes. Not the prettiest but it’s stuck together. I was really proud I only dipped the tip once today.

 

[O’Curren Metal Farm]

My seat post tube got a little file action hehehe

 

[rev106]

nice!

 

[Scrap Wolf]

Definitely going to watch this thread! Nice

 

[Chad T]

Wow!...nice detail on that seat tube.

 

[O’Curren Metal Farm]

Little out of order, but here’s a shot of the roller action.
But the successful shaping of that down tube using some Swag Off-road dies happened after messing up some nice chromoly tubing on the Harbor Freight dies. 1.5” tubing should be good in 1.5” dies right? Haha nope. Well maybe if it was shaped right. I didn’t notice and kept going creasing the bottom piece. The top piece was after messing with roller and making shims to try n keep it from wiggling. It was digging in anyway.

 

[O’Curren Metal Farm]

To make the rear end it needs some drop outs right? Let’s get some the hard way.

 

[O’Curren Metal Farm]

Then ...

 

[HuffDaddy]

Very nice!

 

[O’Curren Metal Farm]

I was trying to draw out how I would drill holes in both pieces to look good and somewhat similar between pieces but it just wasn’t working out on the left one. So the right side got the holes drilled but what about the other? Well what would fit wasn’t what I wanted to do, but kinda the only right answer. So I made another OMF clover. This ain’t some racing alu’ chainring or something, 0.19” 4130 plate made me work for it.

 

[The Renaissance Man]

Nice work going on here!

 

[Captain Awesome]

Good looking work so far!