SWB0 Vertigo Granny

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(Except very short riders, because their parts will collide with the sprockets) :p
Change I'd be willing to take
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Fun fact: I can heighten the bottom bracket too. You'll see soon when I start mocking up after welding. Then short riders have a scary ride, but safe parts! :grin:

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Left: Seatpost frame CrMo tube.
Outside diameter is 28mm, inside diameter went from 25 to 25,4mm.
Right: Bottom Bracket pot with the 25mm CrMo shaft hammered in hard! An oil droplet remains. I intend to clean and weld it soon.

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Plate to cover the factory holes (they were not aligned, so better not show).

I pressed the aluminum truvative adapters in so the bottom bracket pot will not bend due to the welding.

Grateful and really excited!
 
Back home, tried to fit the parts and they are snug in there.

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The seatpost fits perfectly without play. A mechanical dream!

Royal Dutch Airlines Travel GIF by KLM


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Found some parts. Pedals are ugly with the red, but technically good. I have some ideas with that.

Sprocket has a little wobble so I'll probably have to get the hammer out of the toolbox again.
surprised hammer GIF



Sorry, those gifs are cracking me up :rofl:
 
I've built a few flip bikes and used the exact method, sliding the BB post into the original seat tube. They all eventually needed pinned. The seat post bolt isn't enough to hold the post from twisting when you get cranking on it. It'll cruise all day but getting on it will stress it till it starts to twist. Now YRMV but a single bolt thru or a couple plug welds does the trick after you've got your heights figured out ( chain clearance and such ) I'm diggin' it though. Gotta love a flip bike!
 
I've built a few flip bikes and used the exact method, sliding the BB post into the original seat tube. They all eventually needed pinned. The seat post bolt isn't enough to hold the post from twisting when you get cranking on it. It'll cruise all day but getting on it will stress it till it starts to twist. Now YRMV but a single bolt thru or a couple plug welds does the trick after you've got your heights figured out ( chain clearance and such ) I'm diggin' it though. Gotta love a flip bike!
Thanks for the heads-up! I already thought of that ;) I already took a thicker walled tube on purpose for the bottom bracket.
I welded a plate for a bolt and possibly a slotted hole:
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First welding session is done. There are a few more things I want to weld on the frame for a stronger/stiffer seatpost.

The bottom bracket is welded too.

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The project is a little slow for now. Had a lot of other stuff to fix and do at home.

One of them was changing the timing belt of my car.
It is not hard to work on, but the limited space in the engine bay makes it a challenge ;) For some vehicles, this is a VERY spaceous area.

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Engine mount removed first.

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Timing belt is located underneath the cast aluminum cover (just left of the yellow oil filling cap).

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And there it is!



Sorry for the offtopic, I made a 'quick mockup' to check for tire and chain adjustment space.
And to check the bottom bracket height in comparison to the seat height.
The smaller sprockets turning beneath the buttocks is something to keep in mind in relation to the seat. I need enough space to pedal and do not want to pedal with my legs wide.

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I planned on cutting a bit away, so this is not a problem.

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With BB.

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BB height in centimetres. I can go down with a lower seat. But this gives me an idea in regards to space.
 

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Now I'm waiting for a 2mm plate that I ordered at the lasercutter. The cutter I go to has a minimum order quantity and I designed a cog for a friend that was just below that. So I get my plate for free!

But managed some little stuff:

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Seatpost reinforcement. CrMo tube cut off, now time for notching by file.

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Nearly good, next notch!

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Good enough.

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Cutting the pipe to clear the tire.

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Result!
I scrubbed the paint off locally for welding...

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Aligning and then securing the bottom bracket before drilling a hole.

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Left: frame. Right: Bottom Bracket pipe. Holes aligned.
Now I can make the hole from the right piece longer in the mill, so I can tension the chain by bottom bracket.

Hopefully I can soon weld for the last time so I can start the rough mockup!
 
Cool idea to stretch the chain with the bottom bracket!
Thank you!

So made the mechanism:

What do you guys think of an 'open crankcase'? :p

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Opening her up. Already made the slotted hole.

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I'm in the confetti business... tapping M8 thread.

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Smooth...
About 30mm of slide. Enough to tension a chain.


So I was thinking about the chain... I hope that the chain doesn't hit the chainstay with the smaller sprocket under the seat. We will see how that works out!
 
Hey guys,

Still waiting on that lasercut plate (along with the rest of that order).

And I planned on assembling the Tannus tires with the locking pins.

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Easy enough.


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About 21,5mm + 3,5 is 25mm.

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These three sizes of pins came with the tires...
They don't fit... they are too small.

So I went on the interwebs and I could not find a Dutch/German/Belgium dealer that sells these pins...
And the 'TannusBeNeLux' website is having issues.


I might have to think about a different tire...
I emailed them and will wait for a response.







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So I started with the pedals. These came off my electra ratrod bike. I am thinking about removing the rubber blocks and use wood instead.
Now that I have opened them, I can lubricate them too!


I might use the resulting pedals on my buildoff 18 bike:
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Hi guys.

So the lasercut plate came in together with an sprocket that I'm building for a friend:

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3D printed Nylon and lasercut steel.


Alright, back to the bicycle:

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The plate gives the seatpost tube some extra sideways stability, since the lower part is a steel open rectangular tube, which is not very stiff.

Hopefully I can weld tomorrow!

After that I am thinking about colours. I am unsure if I will make a full mockup first.

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Found a front sprocket too! From an Electra Ratrod. Its from my previous ratrod that I sold a few years back. The owner did not need that part.

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Colour tryout! A bit messy and droopy painted, but you'll get the idea.

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Dark grey and metallic red. The red takes quite some layes to get coverage. Is that due to the 'metallic' effect?

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Pink and Chocolate brown.

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Metallic Gold!

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So I will work with these colours, pink and/or gold and/or chocolate brown.

I am thinking about an effect like fade or dipping a sponge.
The effect would make the front a bit heavier/darker since there is a lot going on on the back of this bike.
I do like the idea of pink rims with an gold and brown frame.
Or gold rims with and gold/brown frame.

I'm not set on anything just yet, so feel free to post cool ideas!

I might try this effect with above mentioned colours:
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Dipping with an plastic bag. Could also work with a sponge.


Aaaand...

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From a previous build, I have these 'prototype' fenders left.
They are made from Mahogany wood.
I made them by placing the fenders in water for hours. Then pre-bend them, after they dried I would glue two pieces together in the mold I made from bicycle wheels.

These fenders are 70mm wide, I can cut them in half, since this is a skinny build.

I do like the fender colour with the above mentioned colours... what do you think?
 
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Another thing I forgot to mention in the previous post.

I have to sell the Tannus solid rubber tires unfortunately.
The rim is too wide for these 28x1.1" tires.

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21,5mm wide.

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Tire here is a little more than 17mm.

Rookie mistake, but thats fine. I learned something :thumbsup:

I will look for different tires. Maybe even a colour other than black... we'll see.
 
Dipping with an plastic bag. Could also work with a sponge.
A sponge will make more of a repeated pattern, it's always the same shape. Plastic bag would be more random, as the shape, and thus the imprint made, will change with every stamp
 
A sponge will make more of a repeated pattern, it's always the same shape. Plastic bag would be more random, as the shape, and thus the imprint made, will change with every stamp
Agreed!

Finished welding and cut the prototype wooden fenders in half.
I made a loose mockup utilizing everything lying around, so things do not fall off.

I am still thinking about tire and colour options. Have not decided yet. Just a light preference for a gold coloured frame.

Enjoy!

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Fender

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Not perfect, but I'm getting better at welding!

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Front fender a little higher on the bottom part. I can cut excess length at the front.

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I can cut it about there.
 
Man, those angles! every time I see Oma's lines, I think of R Crumb
View attachment 258288
Keep up the good stuff
Never heard of that guy, I'm going to do some research, thank you sir :thumbsup:

These are my tire options at the moment:
  • Skinwall (Schwalbe Lugano 2 or Continental Dynamic Classic).
  • Michelin Dynamic Sport Blue wall.
  • Michelin Dynamic Sport Red wall.

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My options for colour combinations:
Coloured details not mentioned and I added some more colour options in regards to the previous post!
+ I think, after seeing the mockup, that I will leave the grey rims as is. Maybe brush/polish it a bit.


1: Metallic golden frame. Red wall tires.

2: Metallic golden frame. Blue wall tires.

3: Metallic golden frame. Skin wall tires.

4: Off white frame. Skin wall tires.

5: Chocolate brown frame. Skin wall tires.
Golden accents.



These are the five options I am thinking about right now. I have some neat ideas regarding details with a red (RAL 3020) spray can I have lying around.

I love the pink colour I mentioned earlier, but I feel it distracts from the overal bicycle. I don't want it to scream all the attention away.



What is your favorite option? Trust me on the details ;)
 
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