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Well constructed frames vs sloppy messes

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Old 12-16-08, 11:18 AM
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That Remy uses a motif darn close to Colnago, I am surprised Ernesto did not club them.
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Old 12-16-08, 11:34 AM
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maybe it doesn't fit the title of the thread perfectly, and if theres another thread on this please forgive my stoopitude, but i know that one area i look at when deciding whether to buy or pass on a bike are the dropouts--stamped vs forged, brazed vs crimped, etc. anyone have any thoughts on that? i have come to some conclusions of my own but i wonder if there's anyone else out there who might need or like to be able to tell the difference between these various dropout types.
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Old 12-16-08, 02:03 PM
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Originally Posted by fearfeasog
maybe it doesn't fit the title of the thread perfectly, and if theres another thread on this please forgive my stoopitude, but i know that one area i look at when deciding whether to buy or pass on a bike are the dropouts--stamped vs forged, brazed vs crimped, etc. anyone have any thoughts on that? i have come to some conclusions of my own but i wonder if there's anyone else out there who might need or like to be able to tell the difference between these various dropout types.
You have to consider the age of the frame, because stamped dropouts and cottered cranks were common on high-end bikes until well into the 1960s. From the mid-1960s onward, I, too, would avoid stamped dropouts, but here's a very nice 1960 frame with them.
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Old 12-16-08, 03:37 PM
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Originally Posted by John E
You have to consider the age of the frame, because stamped dropouts and cottered cranks were common on high-end bikes until well into the 1960s. From the mid-1960s onward, I, too, would avoid stamped dropouts, but here's a very nice 1960 frame with them.
that is well worth knowing, thanks for that. BTW is that an adjustable reach stem on that baby? do they still make something like that? seems like a great idea.
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Old 12-16-08, 03:40 PM
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that brings up another question, i suppose--how does a newbie tell a stamped D.O. from a forged? any pictorial examples? i always assumed the ones with the raised area around the slot and sort of rounded edges were forged and the ones that look very very flat with sharp edges are stamped, is that right in general?
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Old 12-16-08, 03:58 PM
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Originally Posted by fearfeasog
that brings up another question, i suppose--how does a newbie tell a stamped D.O. from a forged? any pictorial examples? i always assumed the ones with the raised area around the slot and sort of rounded edges were forged and the ones that look very very flat with sharp edges are stamped, is that right in general?
yes, a stamped dropout is going to be flat. Nowadays there are high quality cast and machined dropouts.
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Old 12-16-08, 04:23 PM
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Old 12-16-08, 04:26 PM
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Originally Posted by fearfeasog
that brings up another question, i suppose--how does a newbie tell a stamped D.O. from a forged? any pictorial examples? i always assumed the ones with the raised area around the slot and sort of rounded edges were forged and the ones that look very very flat with sharp edges are stamped, is that right in general?
You got it!

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Old 12-17-08, 11:50 AM
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Originally Posted by fearfeasog
maybe it doesn't fit the title of the thread perfectly, and if theres another thread on this please forgive my stoopitude, but i know that one area i look at when deciding whether to buy or pass on a bike are the dropouts--stamped vs forged, brazed vs crimped, etc. anyone have any thoughts on that? i have come to some conclusions of my own but i wonder if there's anyone else out there who might need or like to be able to tell the difference between these various dropout types.
Adding to fearfeasog's question, does the "well constructed" vs. "sloppy mess" discussion extend to alignment of the dropouts, specifically the fork tips? The tips on my '93 Corsa Extra are nowhere near parallel. I'm not the original owner so I don't really know - how much slop would you expect here?
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Old 12-17-08, 12:01 PM
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Originally Posted by gt95
Adding to fearfeasog's question, does the "well constructed" vs. "sloppy mess" discussion extend to alignment of the dropouts, specifically the fork tips? The tips on my '93 Corsa Extra are nowhere near parallel. I'm not the original owner so I don't really know - how much slop would you expect here?
Pics?

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Old 12-17-08, 12:11 PM
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Originally Posted by gt95
Adding to fearfeasog's question, does the "well constructed" vs. "sloppy mess" discussion extend to alignment of the dropouts, specifically the fork tips? The tips on my '93 Corsa Extra are nowhere near parallel. I'm not the original owner so I don't really know - how much slop would you expect here?
Ideally, none. Both front fork dropouts and rear triangle dropouts should be parallel. Many complaints of QR axles slipping in the dropouts can be traced to the dropouts not being paralel.

Cold setting dropouts so that they're parallel can be done using the Park Tool FFG-2 Dropout Alignment Gauge or similar. Note the caution about cold setting aluminum, titanium, carbon fiber, or suspension forks.
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Old 12-17-08, 01:19 PM
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4 BB shells: 2 made in Japans, 1 U.S. and 1 Italian. Can you spot the Italian (without cheating)







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Old 12-17-08, 01:22 PM
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Last one. Dead giveaway - BB has been threaded from one end to the other.

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Old 12-17-08, 01:32 PM
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Originally Posted by cudak888
Last one. Dead giveaway - BB has been threaded from one end to the other.

-Kurt
I never knew that but it makes sense....

#1 is a Panasonic made Schwinn Peloton. Columbus SL/P tubing. Notice that the stays are 'tacked' into place before brazing

#2 is a Pro Miyata. Not bad for mass produced frame. Tubes are properly mitered. Some companies simply bend the tube over where it butts up against the other.

#3 is a Waterford Paramount

#4 is a Columbus SL Tommasini with tack welds
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Old 12-17-08, 01:37 PM
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I knew it couldn't have been #3 because it was just a little too clean. Incidendly that is what a marinoni looks like.. perfection!
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Old 12-17-08, 01:56 PM
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Originally Posted by miamijim
I never knew that but it makes sense....
Open up a gas-pipe Atala if you want to see an extreme example of this. Solid threads in the BB, from one end to the other.

It isn't uncommon to find nice machines with threading marks from one end to the other though. Have a look the next time you're re-packing an Italian BB.

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Old 12-18-08, 07:58 PM
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Originally Posted by cudak888
Last one. Dead giveaway - BB has been threaded from one end to the other.

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Old 12-19-08, 11:05 AM
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The only lug shot I have of my 1983 3Rensho. I will try and get shots to compare it versus my 85ish Colnago Sprint and my 86 Paramount.
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Old 12-20-08, 08:40 PM
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1987 Paramount (Waterford) lugwork.

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Old 12-20-08, 09:06 PM
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Originally Posted by Scooper
... Note the caution about cold setting aluminum, titanium, carbon fiber, or suspension forks.
Add 753 to that list.
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Old 12-21-08, 05:18 AM
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spot the gaspipe frame



but i think its rather redundant comparing low price frames to the likes of Confente or 3Rensho, its not hard to spot that difference. What is more interesting, is to spot differences in high-lvl frames.

So, here's a little contest for ya, spot the Zunow, Mike Appel, Merckx and Casati (1st to not find the Zunow wins a pair of eyeglasses). Shouldn't be to hard!

I think these pictures show a lot about the art of framebuilding...









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Old 12-21-08, 06:58 AM
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Originally Posted by mkeller234
Hanging around C&V I see alot of talk about frame craftsman ship, things like lug filing, brazing, paint etc. What I want to know is what does a great frame look like, and what does a poor frame look like? Take for example this Confente frame that just sold:

https://cgi.ebay.com/ws/eBayISAPI.dll...0%3D%26fvi%3D1

I have read comments in a previous post about there being some flaws in the build quality, what are they? What does a sloppy bike boom Raleigh look like, what does a good bike boom Raleigh look like? I am not asking this to be silly, I am genuinly interested in what I am asking. Are frames by Masi, Confente Mercx, Cinelli and the like of superior build compared to a Schwinn Paramount or Raleigh Professional? Or is it purely the mojo of a frame handbuilt in a small shop by a known master? Pictures help.

Thanks!

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Here's some bad lugwork:

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Old 12-21-08, 08:39 AM
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Oh man.... that looks like a Raleigh fork?

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Old 12-21-08, 10:16 AM
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Originally Posted by mkeller234
Oh man.... that looks like a Raleigh fork?
Yep. Typical lugwork you might expect to see on a Raleigh 3-speed. I believe they left the bottom of the lug slotted open for the purposes of slathering brass in there. Did not always work either.

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Old 12-21-08, 10:17 AM
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Are the lugs spot-welded on that Raleigh? The bottom of the head tube-top tube lug sure does look like it.
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