Fixing a Victorian

[grantoury]

Another strange thing. The handle bars thread onto the gooseneck. Why? This seems like unnecessary overkill. Can you imagine how perplexed I was trying to figure out how to get them apart. How did they thread it with the gooseneck basically a C clamp? Crazy idea.View attachment 633580

No clamp means weight saved?

 

[Nabeaquam]

No clamp means weight saved?

There is still a clamp, which makes it so weird. If you look closely you can see where the clamp for the bolt goes. The collet seat post binder does save weight, I wonder how well it holds the seat post? These bars turned out straight enough that you can’t tell they were bent. I’m thinking the slight out of roundness and probably not perfect side to side will be noticeable when it’s ridden. I straightened the bars, then took out the flat pinch spots by squeezing in a bench vice between hardwood blocks to keep the vice jaws from marring the bars.

 

[Mickeyspinn]

Threaded bars is strange...I'm wondering wether if it has anything to do with how the bars were initially held to form them?
I guess also it increases contact area in the clamp but can't really see the need?
I'm sure that collated seatpost will hold just fine...how deluxe!

 

[Nabeaquam]

Here is the homemade inch pitch cog. Every other tooth is ground off of a 1/8 inch 18 tooth track cog. It’s not nearly as thick as the chain, which will cause accelerated wear, but this bike will be seldom ridden. I want a rider, but it won’t be heavily used so I’m hoping this will work and be OK.
The stripped real inch pitch cog and my attempt at a homemade replacement. Stainless steel doesn’t look as good as the old cadmium or zinc plated parts.

 

[legrandefromage]

So no SRAM 1x12 Eagle then? I thought that is what everybody does to an old frame these days

 

[Woz]

Just wondering about those bars.

Is the threaded part simply an "elaborate no crush area" because the wall thickness is low?

Typically a sleeve would do the job, but the manufacturer never let "overkill" get in the way for the rest of the bike. Having It threaded does of course increase the contact area and friction and dispense the risks off overtightening. Perhaps a larger rider grunting on those fairly long drop bars could cause slippage with a traditional set-up (remembering too if the finish was smooth shiny nickel)?

 

[Nabeaquam]

So no SRAM 1x12 Eagle then? I thought that is what everybody does to an old frame these days

Thanks for telling me this, I’ll look into doing that.

 

[legrandefromage]

XTR then, anything weird, proprietary and incompatible with everything else, 19th century meets 21st.

Or 200GS, that will outlive us all.

 

[Nabeaquam]

It’s 8C with a stiff north wind over our frigid lake. Rain showers, mosquitoes and black flies (the wind helps with the bugs). I built the rear wheel inside today because I’ll need gloves to work outside and that doesn’t work with mechanical tinkering. I’ll true it when it’s warmer.

 

[mdvineng]

Another strange thing. The handle bars thread onto the gooseneck. Why? This seems like unnecessary overkill. Can you imagine how perplexed I was trying to figure out how to get them apart. How did they thread it with the gooseneck basically a C clamp? Crazy idea.View attachment 633580

For a track bike, the strain on the bars is immense, so the thread gives a massive increase in gripping force from a simple and light clamp. That's how I view it.