Lemond model comparison chart - 853

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09-10-25 | 09:10 AM

#51

jamesdak

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Joined: Aug 2010

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From: Utah

Bikes: Paletti,Pinarello Monviso,Duell Vienna,Giordana XL Super,Lemond Maillot Juane.& custom,PDG Paramount,Fuji Opus III,Davidson Impulse,Pashley Guv'nor,Evans,Fishlips,Y-Foil,Softride, Tetra Pro, CAAD8 Optimo,

Quote:

Originally Posted by Fcgoulart

Hi all, new member here. I recently was commissioned to repair my buddy’s poprad frame. Long story short, he got t-boned (low speed) and the seat tube cracked. I took some measurements of the seat tube and I’m a little perplexed. The OD is 31.8mm, ID is 27.2mm which is a pretty thick wall. I went on to firsthand to grab a new seat tube and I cannot find an 853 tube that fits the measurements. Best I can do is 31.8mm OD, 30.6mm ID. Does anyone have any in depth knowledge of the 853 tubing used at that time? I know it’s a really obscure question, but just throwing the net out and seeing what I can find.
thanks all!

Maybe dig through the various Lemond Tech manuals here. I think somewhere in there they discuss the various mix of 853 tubes used on the bikes.

https://www.vintage-trek.com/trek-fi...ein-lemond.htm

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09-10-25 | 10:57 AM

#52

Darth Lefty

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Joined: May 2013

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From: Folsom CA

Bikes: Stormchaser, Paramount, Tilt, Samba tandem

Quote:

Originally Posted by Fcgoulart

In late steel bikes, thin wall oversize tubes became common but the seat tube was sometimes shaped like a baseball bat to maintain the same 27.2 seat tube interface as a Reynolds 531 bike from the seventies

Example, though this is not likely exactly the same product 25 years later
853, 31.8 to 28.6, 8-5 x 650 "Pro Team" Tapered Seat Tube – Firsthand Framebuilding

How do you intend to repair it? This stuff is very thin for hobby garage welding

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Last edited by Darth Lefty; 09-10-25 at 11:03 AM.