slalom hard tail

Now we're talkin'. That frame will build into quite the b!tchin' bike. It's kind of hard to tell from the pictures, but does it take a mid BB? Are you going to run a rear derailleur?

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that's nice home slice!!

holy crap that's cool.

Sick bikes.

Use a little more rod, maybe

It could just be the pics or my imagination, but I'd throw a bit more rod in there when welding. Looks like you've got some low spots and/or undercuts. But it's hard to tell, my apologies in advance if that's not the case.

-Walt

That is very nice! I like the twin TT.............Please post it up when you have it built. :thumbsup:

Wow - very cool! Lots of neat touches on that build. A cleaner Evil Imperial comes to mind. Not sure if you are an old schooler BMXer but it reminds me of some early 80's rigs: Torker with the twin top tubes (yours looks much better with those nice bends); Patterson with the low slung main tubes with higher seat tube; RRS with the dropouts. And a bit of JMC with the pinch bolt seat tube.

What's the geo on that thing? Like Vlad asked - mid BB and are you running gears or SS?

A mid BB is a cupless, press-fit BMX bottom bracket. It's basically an American BB minus the aluminum cups that the bearings sit in. They press relatively easily into a specific BB shell.

Vlad said:

A mid BB is a cupless, press-fit BMX bottom bracket. It's basically an American BB minus the aluminum cups that the bearings sit in. They press relatively easily into a specific BB shell.

Click to expand...

YUP.In crude laymans terms Its kinda like a BMX style BB30(different sizes though,same concept), but BMXers we're ahead of the game years back.

How'd you form that seat tube / top tubes interface gusset-y thing? Looks like two pieces clamshelled together?

dr.welby said:

How'd you form that seat tube / top tubes interface gusset-y thing? Looks like two pieces clamshelled together?

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Hmmm, I see that now too. I assumed the first time that it was a plate that was cut and radiused that way. But I could see what you're saying too.

It's a standard bottom bracket, with threads. Like the dr. guessed, there are two plates welded together and the weld was ground off. The plates were formed using a tool called a dimple dye, which is basically a male / female stamping tool that rolls a lip around a whole.

blue.RACCOON said:

Like the dr. guessed, there are two plates welded together and the weld was ground off. The plates were formed using a tool called a dimple dye, which is basically a male / female stamping tool that rolls a lip around a whole.

Click to expand...

Dimple die. That's what I thought it looked like, but I had no idea what the darn tool was called. Very slick.

Looks great! I love the Torker look! And of course, I like a good lookin' aggressive styling.

Could you list the tube sizes and thicknesses? Especially the seat tube.

Thanks.

thanks. chainstays (3/4"x0.035") seat stays/top tubes (3/4"x0.035") down tube (1 3/8"x0.035") seat tube (1 1/8"x0.035") head tube (1 1/2x0.083"). Neglecting warpage from welding, the seat tube id is 26.797mm, so I'm planning on a little reaming and running a Thomson 26.8 post. And no gaurantees that running 035 wall aricraft spruce tubing everywhere is safe, but I've had good luck with 049 downtube / chainstays and 035 everywhere else, so I'm trying 035 and gonna see what happens.

That thing is sexy, can' t wait too see it built up

The geo looks really good. I like a little tighter chainstays nowadays but 16.25" are still pretty tight and I've done fine with bikes at that length. Plus you'll have a little extra room for bigger rubber and still use a larger front ring.

I thought it was just one plate for the seat tube junction - didn't see the 2nd on the bottom. Love the dimple die method - looks really clean.