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Thread: Cracked lug?

  1. #1
    Ron Wood is cool.
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    Cracked lug?

    I just noticed last night what may be a crack in the top tube/seat tube lug on my PSV10. It is about 3mm long. I looked at it extensively with a magnifying glass, unable to tell if it's a small nick/gouge in the paint or if it's indeed a crack. The 'crack' appears to be only on the surface of the lug. When i look along the length of the top tube towards the rear of the bike, the crack is not in the wall thickness of the lug. If this is indeed a crack, will it get worse as to be unrideable?
    You know judge, my dad... never liked you.

  2. #2
    juneeaa memba!
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    bummer. if it is a crack, it will only get worse with time. If not, and it is really hard to tell, then it will just worry you to death. I have a trek 959 from 1981 with a line on the bottom bracket shell. It is probably not a crack, it is linear and clean, and hasn't changed in two years. But I check it every time I ride it...

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    Quote Originally Posted by luker View Post
    bummer. if it is a crack, it will only get worse with time. If not, and it is really hard to tell, then it will just worry you to death. I have a trek 959 from 1981 with a line on the bottom bracket shell. It is probably not a crack, it is linear and clean, and hasn't changed in two years. But I check it every time I ride it...
    The line on my lug is not linear but it does not run to the edge of the lug. Would a crack be more likely to start at the edge of the lug and run inward?
    You know judge, my dad... never liked you.

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    The few cracked lugs I've seen have failed close to the junction with a tube. In other words, if your seat cluster has a crack on top, I'd expect it to very close to the seat tube.

    Neal

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    Senior Member RK1963's Avatar
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    Quote Originally Posted by Luis Ocana 1973 View Post
    I just noticed last night what may be a crack in the top tube/seat tube lug on my PSV10. It is about 3mm long. I looked at it extensively with a magnifying glass, unable to tell if it's a small nick/gouge in the paint or if it's indeed a crack. The 'crack' appears to be only on the surface of the lug. When i look along the length of the top tube towards the rear of the bike, the crack is not in the wall thickness of the lug. If this is indeed a crack, will it get worse as to be unrideable?
    Many years ago, my LBS owner told me this model is not suitable for heavier riders and I got the message that it is not that strong of a frame. This info, plus your mention of a crack, would lead me, if I owned the bike, to replace it.

  6. #6
    feros ferio John E's Avatar
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    I have broken several frames, but only one at a lug -- on my Nishiki, the seat tube lug broke away from the rest of the bottom bracket shell. I am a bit surprised by a crack in the top tube / seat tube lug, since this is a somewhat lower-stress point on the frame.
    "Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
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  7. #7
    crotchety young dude el twe's Avatar
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    I have to ask...Is your seatpost above the limit line?
    Quote Originally Posted by CardiacKid View Post
    I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
    IRO Angus Casati Gold Line

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    Sometimes knows stuff. rmfnla's Avatar
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    The interesting thing about this thread is you all forget (or do not realize) that on a decently made frame the lugs contribute very little to the strength of the joint.

    If the tubes are properly mitered the real bond is where the tubes themselves meet; the lug just acts to support the tubes during assembly and to duct the solder (or brass) during joining.

    I wonder if a cracked lug will matter at all..?
    Last edited by rmfnla; 12-26-07 at 03:37 PM.
    Today, I believe my jurisdiction ends here...

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    Ron Wood is cool.
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    No, my seat post is not above the line. I've had the bike less than a week and have ridden it only 20 miles. After looking at it very closely with a magnifying glass, it looks more like a nick in the paint and then a scratch. I'm not so sure it's a crack.
    You know judge, my dad... never liked you.

  10. #10
    Sometimes knows stuff. rmfnla's Avatar
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    As Emily Litella would say, "Never mind..."
    Today, I believe my jurisdiction ends here...

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    www.theheadbadge.com cudak888's Avatar
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    Bullcrap. The frame's whippiness does not equal weakness. My 220/230lb body owned the exact same machine that Luis has, and despite some nice hard riding, I didn't encounter any problems.

    P.S.: I severely doubt if weight is as much an issue as that of the power that the rider may be capable of.

    To the OP: We need pictures.

    -Kurt

    Quote Originally Posted by RK1963 View Post
    Many years ago, my LBS owner told me this model is not suitable for heavier riders and I got the message that it is not that strong of a frame.

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    . blickblocks's Avatar
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    Would any of you guys know if my Peugeot is a PSV10?

    My new Peugeot!!!

    There are so many models I can't tell.

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    Quote Originally Posted by blickblocks View Post
    Would any of you guys know if my Peugeot is a PSV10?

    My new Peugeot!!!

    There are so many models I can't tell.
    I think you posted in the wrong thread, young man.

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    www.theheadbadge.com cudak888's Avatar
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    Quote Originally Posted by retyred View Post
    I think you posted in the wrong thread, young man.
    Yes he did, but I'll save him the bother of posting somewhere else - he has an '83 PSV-10.

    -Kurt

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    Quote Originally Posted by cudak888 View Post
    Yes he did, but I'll save him the bother of posting somewhere else - he has an '83 PSV-10.

    -Kurt
    You're too nice, Kurt. He already has another thread in progress on his Peugeot in which he states the frame is Vitus 980. I can see the sticker on the downtube. I guess I'm short on patience today.

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    Quote Originally Posted by retyred View Post
    You're too nice, Kurt. He already has another thread in progress on his Peugeot in which he states the frame is Vitus 980. I can see the sticker on the downtube. I guess I'm short on patience today.
    Oops, my apology. I reread his post. Was looking for Model no., not tubing type. Now where did I put my meds?

  17. #17
    . blickblocks's Avatar
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    Quote Originally Posted by retyred View Post
    I think you posted in the wrong thread, young man.
    Nope. See a bunch of guys talking about PSV10's and figured it would be good to ask and link to my thread in case you could answer.

    Young lady.

    Thanks for the year and model Kurt. I figured it was a PSV10 since they looked to have the same frame, but the gruppo and tubulars confused me.

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    [QUOTE=blickblocks;5804752]Nope. See a bunch of guys talking about PSV10's and figured it would be good to ask and link to my thread in case you could answer.

    Young lady. ;

    Oops, my bad. At least I was half right.

  19. #19
    Ron Wood is cool.
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    I weigh about 200lbs and the psv is a 56cm. The bike appears to be low mileage and well kept. What i'm worried is a crack is close to the edge of the lug, on the right side of the top tube. It is nowhere near the joint. I would post pics but none of them were useable.
    You know judge, my dad... never liked you.

  20. #20
    crotchety young dude el twe's Avatar
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    Have you scraped any paint away to confirm it's actually a crack?
    Quote Originally Posted by CardiacKid View Post
    I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
    IRO Angus Casati Gold Line

  21. #21
    Ron Wood is cool.
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    No, i haven't scraped away any paint. Should i ?
    You know judge, my dad... never liked you.

  22. #22
    crotchety young dude el twe's Avatar
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    I don't know any other surefire way to make sure that it is/isn't a crack in the metal.
    Quote Originally Posted by CardiacKid View Post
    I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
    IRO Angus Casati Gold Line

  23. #23
    Ron Wood is cool.
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    What should i use to scrape away some of the paint?
    You know judge, my dad... never liked you.

  24. #24
    crotchety young dude el twe's Avatar
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    I used a knife blade.
    Quote Originally Posted by CardiacKid View Post
    I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
    IRO Angus Casati Gold Line

  25. #25
    Senior Member miamijim's Avatar
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    An old trick to find cracks is to wipe the area with acetone or alcohol. Both are very thin and seep into cracks easily. They both evaporate very quickly with the crack being the last place of evaporation.

    I dont think your issue would work well for the test as the 'indentation' in the paint will hold the liquid.
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

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