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Metamorphosis of a made in USSR folding bicycle

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Metamorphosis of a made in USSR folding bicycle

Old 05-17-07, 05:09 AM
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caotropheus
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Metamorphosis of a made in USSR folding bicycle

Greetings fellas

Remember this thread?

https://www.bikeforums.net/folding-bikes/167255-folding-russian-bicycle.html

Well, I replaced all components except the fork and seatpost, frame and stem clamps.



Frame and fork - original
hub front - Campagnolo Record at least 5000 years old
hub rear - Dura Ace at least 3000 years old
Rims - Answer 28 holes 451 mm
Drive train - single speed
Crank - Old Shimano 105 52 teeth
Freewheel - AC racing 15 teeth
Chain - KMC
Seatpost - 25.0 mm Kalloy
Saddle - cheapo
brakes - cheapo
spokes - DT Swiss 2.0 mm
stem - Combination of seatpost 28.6 and Tranz-x
handlebar - road, steel, cut at the curve
cables - Clarks
brake levers - Cane creek 200 TT
Pedals - Coda SPD
Starting Weight 16 kg
Final Weight 10.5 kg
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Old 05-17-07, 06:43 AM
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gbcb
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Well, I'm extremely jealous... How does it ride, and how does it fold? You should get a nice big yellow star for a head badge
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Old 05-17-07, 08:36 AM
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Ah yeah, I remember this bike! I also saw you posted in in the what bikes do we all have thread, and I wondered about it.

I think you did an excellent job. Light weight, considering the heavy frame! My R20 ended up heavier than original once I tucked it out for loaded touring...

And the handlepost - is that the Kalloy straight post that narrows to 22.2mm, from aebike! I mentioned this idea once... recently when I decided I wanted one of those straight seat posts, there were none left!

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Old 05-17-07, 10:13 AM
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With a paint job this bike looks like a U$thounsands bike.

Congratulations.
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Old 05-17-07, 11:19 AM
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The bicycle rides very well and it is very fast. Saturday I will ride 55 km on this bicycle in a fairly flat place and then, I will let you know the details.
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Old 05-17-07, 11:31 AM
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Originally Posted by jur
Ah yeah, I remember this bike! I also saw you posted in in the what bikes do we all have thread, and I wondered about it.

I think you did an excellent job. Light weight, considering the heavy frame! My R20 ended up heavier than original once I tucked it out for loaded touring...

And the handlepost - is that the Kalloy straight post that narrows to 22.2mm, from aebike! I mentioned this idea once... recently when I decided I wanted one of those straight seat posts, there were none left!

Jur,

The stem arranjement is exactly as you explained to us in a previous post. I took a strait seat post 28.6 with upper edge 22.2 for basic saddle clamps. I inverted the seatpost, inserted inside the steerer and lock it with the stem clamp. On the "SeatStemPost" I assemble a 130 mm Tranz-x stem. The "SeatStemPost" is alloy and I do not know how strong it is, lets say I would feel more confortable with a steel "SeatStemPost" for standing on the pedals and apply as much force as I want on the handlebar.

Finally, I have these 28.6 strait seat posts at the shop, if you need one, I will post it for you.
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Old 05-17-07, 11:39 AM
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Originally Posted by 14R
With a paint job this bike looks like a U$thounsands bike.

Congratulations.
Painting bicycles is my weakness. The money I have is to invest in new parts for new bikes, or to improve the bicycles I have. One day, probably I will paint it. Right now the bicycle does not look like U$thounsands bike but I believe it preforms like one. After riding a couple of km to test the bicycle I start to believe Sheldon Brown's words that old frames R20 type with the right parts can give you a bicycle very similar to Bike Fridays and similars.
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Old 05-17-07, 01:27 PM
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Dumpster bikes customized with care - Priceless. Nice Job! G.R.
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Old 05-17-07, 04:54 PM
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What about the BB - any special tricks, or was it standard?
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Old 05-17-07, 10:16 PM
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Originally Posted by jur
What about the BB - any special tricks, or was it standard?
Yes, the BB was difinitely different. I will show you my conversion to BSA BB with a set of pictures

What kind of size is this one? A nice bicycle I how will I convert it to BSA BB?!



Let's take it apart!



After measuring, I saw I could slide a childrens BB shell inside this Kama strange BB size



Right thought, but after grinding a lot the children's bicycle BB shell, the center of Kama BB shell is still to narrow to slide the new shell inside. So I was struck by the idea of removing the center part of the children's BB shell and only use the outer threaded edges.



It worked, just glue it with epoxy, use a BB cartridge Shimano UN 52 and voila!

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Old 05-18-07, 08:50 AM
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Very creative. the cold fix allows you to retain that distinctive original paint coat.

One thought for the future: If the epoxy that you bedded the threaded section in ever fails.
Your gap space may be justright for flowing brass in with a brazing rod. A dummy spindle cups and races could be rigged to hold you alignment adn spacing, and then removed and replaced with the UN52 cartridge when you're done.
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Old 05-21-07, 08:33 PM
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Heh, heh Caotropheus tidy job! Nice to see how things develop!
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