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Old 12-27-13, 09:17 PM   #1
bjtesch
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I started a project to bulid myself another bike

I was in a bad crash 3.5 years ago and destroyed my custom frame that I had been riding for a little over 20 years. I had upgraded that bike to all Dura-Ace (7-speed if that tells you something about when the components were made). The components are still in good shape. It took 2 years after the crash before I started riding again and I resumed riding with a crossover bike. This summer I thought I might be ready for a real road bike so I've been looking on ebay for a frame ever since then. I finally found a frame that I think will work and ordered it, a Schwinn Paramount of all things.

I was hoping that all of my components would fit on the new frame and it would be easy to build it up. I had measured the bottom bracket of the old bike to determine if it was english or italian but my measurements were bad and I was wrong. My old frame was a custom frame from a US maker, but turns out to have Italian threads. I'm pretty sure that the Paramount has english threads, so now I have to find a replacement bottom bracket. I actually dismissed some frames that looked promising because they had italian threads, turns out they would have been fine for me. Oh well.

Right before my crash I decided to build new wheels using a freehub so I bought a set of used hubs, and new spokes and rims. Now I get the chance to build the wheels and actually use all of that stuff.

I thought about buying a more modern frame but I would have had to buy too many components. I'm an old guy now and I've ridden steel frames for over 30 years so I don't mind riding an old school frame, I'm even somewhat proud of it. The Schwinn Paramount is somewhat of a unique thing so I'm looking forward to it.
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Old 12-28-13, 07:49 AM   #2
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You might want to post in the mechanics forum. I know that some threading can be changed. Seems like my first good bike had French threads that were changed once if not twice in the life of that bike.

Good Luck with your build and share some pictures with us.
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Old 12-28-13, 10:20 AM   #3
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I'm thinking the BB will be English threaded 68mm, and probably a square taper 'cartridge', and those are pretty easy (and inexpensive) to purchase (try a Shimano UN-55, about $25-$30 new). Just comapre your old frame's BB shell to the new one, then adjust the spindle length appropriately.

For more info, you'd probably want to post in the 'Classic and Vintage' forum. There's a lot of Paramount riders there who wrench their own bikes, and they could easily help you narrow down to exactly what you need for your new (to you) frame.

And yes, post pics of your new build in the C&V forum.

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Old 12-28-13, 04:24 PM   #4
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For more info, you'd probably want to post in the 'Classic and Vintage' forum. There's a lot of Paramount riders there who wrench their own bikes
That sounds like a good idea- thanks for the suggestion.
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Old 12-28-13, 04:55 PM   #5
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...I know that some threading can be changed.
you won't want to change any threads of a paramount, especially going from bse toward something more obscure (french, swiss or italian).

finding a square taper bb for it should be easy. i'd go with an old school cup and cone (sugino, tange, etc), but a lot of people will suggest a new and cheap sealed cartridge unit. i'd post what i need in the c&v 'iso and for trade' thread at the top of the page.

cheers.
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Old 12-28-13, 05:48 PM   #6
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Not Change, .. it's called chasing the threads.. to clean them and remove damage ,

so everything goes together without struggles . You need access to the same tools as
were used to cut the thread though, just not so much cutting ..

Last edited by fietsbob; 12-28-13 at 05:51 PM.
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Old 12-28-13, 05:59 PM   #7
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square taper bb for an old school dura ace crank is easy peasy; i'm running one of these for my DA crank, http://www.amazon.com/Shimano-Square.../dp/B0068FVOEM. Just get one in the right length or have a bike shop do the work for you. Odd that a US custom builder would use italian BB threading. The other parts will go over great (probably) but you'll need to post pics of the build in the C&V forum or folks here will say it never happened. . . .
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Old 12-29-13, 06:26 PM   #8
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Not Change, .. it's called chasing the threads...
the post in which i replied spoke of cutting new threads (not chasing) to use an italian threaded component. in this case it is unwarranted.

i've found chasing a bb in a new build to often be unnecessary. clean both the shell and component real well, ensure they fit (before applying any grease), and then assemble and adjust perfectly.
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Old 12-29-13, 08:06 PM   #9
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The only reason I suggested changing (and I guess cutting is the best word) is the OP seems to be nostalgically attached to the past.

Which seems to be a priorty for some of us.

My BB shell was re-cut to get away from that awful French standard.

Personally I'd rather ride than wrench. A cheap cassette square taper would work for me. Cups and grease and bearing balls are a pain in the ass.

EDIT

Here you go. $13

http://www.universalcycles.com/shopp...2&category=268
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Old 12-29-13, 08:21 PM   #10
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The only reason I suggested changing (and I guess cutting is the best word) is the OP seems to be nostalgically attached to the past.
The donor frame in question is one that I've owned for about 25 years, a Tesch 101. I assumed that a California maker would use English threads, and I measured the threads sticking out past the lockring with calipers and thought I came out close to the proper diameter for English threads. So I looked for replacement frames with English threads. When I started disassembling I found that I had Italian threads instead. I haven't received the replacement frame yet but everything I've read seems to say that it has English threads.

I don't mind cup/cone bottom brackets but they require a little searching to find. I have found a few candidates but I'm not going to try to buy one until I actually receive the frame and can check it out. I thought the only BB's available with cartridge bearings were the fat-spindles with splines and so forth. Those seem to be reasonable alternatives because they are somewhat more available, but I will have to buy new tools to install them with.
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Old 12-29-13, 08:47 PM   #11
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seeing any plastic on a paramount doesn't look right. if you go the cheap route, at least get an all metal bb.
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Old 12-29-13, 09:34 PM   #12
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seeing any plastic on a paramount doesn't look right. if you go the cheap route, at least get an all metal bb.
My plan is to use all Dura-Ace from that era, and I have a line on a D-A BB to buy, that's the route I would like to go.

(Well several years ago I bought some hubs to use to build a new wheelset and I don't remember of those are D-A or Ultegra.)
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Old 12-30-13, 09:01 PM   #13
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The frame arrived today and looks great. It has a few scratches but mostly the paint is in good shape and the frame doesn't appear to have that much use on it. Now to get a bottom bracket and start building.
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