1. The most important thing about buying a new bike is to make sure it fits. The only way you'll know if the bike is right for you is to size up the bike and make sure that the bike's geometry matches your body's geometry. Ask questions and do some research.
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2. If possible, try to find a shop that will let you demo the bike on real dirt. Five minutes in a parking lot won't cut it. You wouldn't buy a car without a real world test drive, and a bike should be no different.
3. Don't belive the hype. Just because your favorite rider or best friend rides a certain bike, that doesn't mean that's the best one for you. Have an open mind and be realistic about your needs and ability.
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  1. #1
    mtbr member
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    Cool-blue Rhythm Cold Weld Frame Repair!!!

    My chain-stay cracked after one too many drop to flats

     photo bottemout.png





    mushroomdrop - YouTube

    Fuglio.. from RCC on Vimeo.




    Zach landing like a freight train to flat, 1st attempt from cabracadabra on Vimeo.





    My frame rebelled against the poor treatment from me and developed a crack. Threatening to hurt me as well if i continued my abuse.

     photo 0621132234.jpg


    With no money and no welder connections. It looked like my drop to flat days were over, if i couldn't fix the frame myself.

    I decided to use an ancient hillbilly technique of "cold welding"

     photo 0621132358b.jpg


    I coated the chain-stay with the paste.

     photo 0621132328a.jpg

    Then i braced the top and bottom with two pieces of steel. I then secured the mess with steel hose clamps

     photo 0622131323a.jpg

     photo 0622131323d.jpg


    Since i was working on my bike i decide i might as well true the wheel before it brakes too.

     photo 0622132243-1.jpg

    Do you like my "truing stand"? like I said no money...


    Ill report back with a ride report on the new cold weld technique, but I suspect I wont have any issues.

    Wish me luck

    Fuglio

  2. #2
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    You say you don't have any money, hopefully you have good insurance.
    13 Lenz Lunchbox punkass

  3. #3
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    IMO,
    All you really did was hide the crack, and thus make it harder to see how much worse it is getting.

    If it doesn't become visible, expect a catastrophic failure somewhere in the future.

  4. #4
    AZ
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    You created several new stress risers in the repair attempt.

  5. #5
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    Quote Originally Posted by bikeabuser View Post
    IMO,
    All you really did was hide the crack, and thus make it harder to see how much worse it is getting.

    If it doesn't become visible, expect a catastrophic failure somewhere in the future.
    no way cause if it cracks below the chain stay will have to flex and if that happens the jb weld will crack

    Quote Originally Posted by Dirty $anchez View Post
    You created several new stress risers in the repair attempt.

    what are these things you speak of??

  6. #6
    AZ
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    Quote Originally Posted by Fuglio View Post

    what are these things you speak of??
    Areas where the stresses will be concentrated instead of being spread out, namely the ends of the angles used in the repair. With the stress concentrated at the ends there will be a higher likelihood of failure at that point, the angles will also tend to act like a giant shear, possibly tearing the stays in half at either end. At the very least the localized forces are likely to form cracks at those points so keep a very close watch on that repair.

  7. #7
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    Quote Originally Posted by Fuglio View Post
    no way cause if it cracks below the chain stay will have to flex and if that happens the jb weld will crack
    what are these things you speak of??
    Says the man who is confident in his repair. Good luck.
    13 Lenz Lunchbox punkass

  8. #8
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    Quote Originally Posted by Fuglio View Post
    no way cause if it cracks below the chain stay will have to flex and if that happens the jb weld will crack
    Time will tell, but I'll add that you really haven't fixed anything, even if you did hide the problem well, and possibly shift it as D$ has pointed out.

    Keep a very close eye on things, and expect the worst.
    JB Weld isn't designed to do what you have done with it, and it is no where near as strong as that frame tube is, in tension or compression.

    http://forums.mtbr.com/frame-buildin...ame-97168.html

    Will "JB Weld" work for my bike frame?

  9. #9
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    The cold weld is just to hold the steel braces in place...... the crack grew about 1/8" on one ride so i think the stress area was all ready concentrated. ... time will tell but not much time i got a new huck to flat i built and haven't been able to try out yet since i was worried about my frame braking so next weekend ill know for sure

  10. #10
    AZ
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    double facepalm

  11. #11
    dru
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    OP, you can do a bit better job than that, and maybe even avoid death or severe injury with a little bit of carbon fiber cloth.

    You've already got some epoxy in the form of the JB Weld.

    Cut all that crap away and start again using epoxy and several wraps of carbon fiber.

    Wrap all that up with electrical tape to squeeze out excess resin and to ensure the resin has fully saturated the cloth.

    The swing arm is toast btw, since the aluminum has fatigued. Welding will only weaken it further since the heat treating will be lost.

    One more thing, drill out the ends of the crack, before re-repairing.

    Drew
    occasional cyclist

  12. #12
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    Quote Originally Posted by Fuglio View Post
    The cold weld is just to hold the steel braces in place...... the crack grew about 1/8" on one ride so i think the stress area was all ready concentrated. ... time will tell but not much time i got a new huck to flat i built and haven't been able to try out yet since i was worried about my frame braking so next weekend ill know for sure
    Just go hit a square curb a few times, and don't blame us ... We warned you !

  13. #13
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    Quote Originally Posted by dru View Post
    OP, you can do a bit better job than that, and maybe even avoid death or severe injury with a little bit of carbon fiber cloth.

    You've already got some epoxy in the form of the JB Weld.

    Cut all that crap away and start again using epoxy and several wraps of carbon fiber.

    Wrap all that up with electrical tape to squeeze out excess resin and to ensure the resin has fully saturated the cloth.

    The swing arm is toast btw, since the aluminum has fatigued. Welding will only weaken it further since the heat treating will be lost.

    One more thing, drill out the ends of the crack, before re-repairing.

    Drew
    Agreed ... So why even bother ?
    At best it's a band-aid on a severed carotid artery.

  14. #14
    dru
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    I'm trying to save him from getting hurt.

    Done properly the repair I suggested could last a long long time.

    What he's done isn't safe at all.

    Obviously my best advice would be a new swing arm.

    Drew
    occasional cyclist

  15. #15
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    Quote Originally Posted by dru View Post
    I'm trying to save him from getting hurt.

    Done properly the repair I suggested could last a long long time.

    What he's done isn't safe at all.

    Obviously my best advice would be a new swing arm
    .

    Drew
    Understood, and I agree ... The OP really needs to spend some money at this point.

  16. #16
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    No replacement parts available its a grey market frame that discontinued anyways. 2006 .

    Im kinda dis hartend. Really thought i would be impressing people with my ingenuity.. ...

    Frame was a loss before ... i at least streached it out for normal duties till the end of the season..

    No more drops to flat on it... sucks really thought i had the thing fixed thanks for talking some sence into me.

    Good news is that my friend will letvme borrow his highline to de virginize the drop. Then illbat least have a landing spotted to build up.....

    Time to start saving up....

    Wanted to be optimistic but this time its better to be realalistic....

    You guys suck im all bummed now

  17. #17
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    Better to be bummed and have us seem like we suck than to have a bike part jammed in your body when that ghetto repair fails.
    '12 S-Works Stumpjumper carbon HT
    '13 Specialized Carve Comp
    '94 S-Works M2

  18. #18
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    Quote Originally Posted by Mark in Baltimore View Post
    Better to be bummed and have us seem like we suck than to have a bike part jammed in your body when that ghetto repair fails.
    No
    I think its fine for regular riding .. rollers... drops with transitions .. fast rocky ****.....

    Asking it to handle a hard bottem out is to much.

  19. #19
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    Aww man, I was looking forward to you nailing the drop on the bike and proving everyone wrong...
    "Let us not become weary in doing good, for at the proper time we will reap a harvest if we do not give up." Galatians 6:9

  20. #20
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    If it were my frame, I wouldn't be riding it at all. Others have posted above the details of why, I can only add that I see it the same....very dangerous. To say it can/cannot take x/y/z types of riding is just asking for a really bad crash caused by total failure.

  21. #21
    AZ
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    Okay, the OP is now posting this in other forums as advice as a suitable fix. Please stop, this is as ghetto a repair as there ever was and should not be used as an example of a repair.

  22. #22
    Afric Pepperbird
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    I found this mentioned somewhere on the interwebs...

    "JB lists its strength at 3960 PSI, which is a little stronger than the
    best values for wood but less than bamboo. So it should be OK for a
    spruce, yellow pine or oak bicycle frame but inadequate a frame made
    of high-performance bamboo tubing."

    You really should test it out on a pine bike before you risk life and limb.

  23. #23
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    Quote Originally Posted by Fuglio View Post
    No
    I think its fine for regular riding .. rollers... drops with transitions .. fast rocky ****.....

    Asking it to handle a hard bottem out is to much.
    I'm not trying to be rude, but your saying you think your repair is fine when you didn't have the basic knowledge to drill the ends of the crack.
    You really don't have any idea of what you're doing and slapped this half ass repair on your frame and calling it all good.

    I just hope you don't end up in the hospital.
    13 Lenz Lunchbox punkass

  24. #24
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    Quote Originally Posted by Dirty $anchez View Post
    Okay, the OP is now posting this in other forums as advice as a suitable fix. Please stop, this is as ghetto a repair as there ever was and should not be used as an example of a repair.
    Join up and link back to this thread

  25. #25
    Total Goober
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    Quote Originally Posted by Fuglio View Post
    You guys suck im all bummed now
    Best line I have seen on MTBR. My new sig, me thinks...
    Quote Originally Posted by Fuglio View Post
    You guys suck im all bummed now

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