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How badly is my Team Miyata damaged? Is it safe?

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How badly is my Team Miyata damaged? Is it safe?

Old 05-13-12, 02:31 PM
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jar351
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How badly is my Team Miyata damaged? Is it safe?

Hello all,
I'm a frequent C&Ver here on BF, but I'm new to this forum so my apologies if this is well-trodden ground. Here's the story: I have a steel-framed '85 Team Miyata that I received about 9 months ago through Craigslist. I rode it for about 6 months before a patch of paint chipped off the top of the down tube, prompting me to take a closer look at the frame's straightness and alignment, something I admit I should have done from the start.

Anyhow, it seems that the top and down tubes have corresponding downward bends near the head lugs. I suppose this indicates a frontal collision, however, as far as I can tell (which isn't very far), the fork seems straight. The bike tracks well enough, again as far as I can tell--I'm not very good at riding with no hands. There is no visible separation between any of the lugs and the tubing and no ripples or creases in the tubing that I can feel with my hands. I've taken some photos to indicate the extent of the bends. For scale, the object in the last few pictures is a 10mm allen wrench.

What do you folks think? Is it safe to ride? Should I have it repaired, scrap the frame, or sell it as damaged goods? Many thanks, in advance, for any commentary you may provide.

Here are a few of the pictures, with the full set at









Last edited by jar351; 05-13-12 at 02:35 PM.
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Old 05-13-12, 04:59 PM
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I don't ride anything I have any doubts about, so if that was mine it would be a goner. That is a very expensive repair, and the paint alone would cost more than what the frame is worth. Since the tubes didn't buckle, you could make the case that it's ok, but it is compromised.
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Old 05-13-12, 08:31 PM
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My 618GT has a pretty sizable dent in the top tube and I've been riding that pretty hard for 2 years without any issues. I feel like as long there's no separation in the lugs and no "creases" in the tubes then seems like you can ride it without much worry, but that's my own personal opinion, and others certainly feel differently.
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Old 05-13-12, 08:36 PM
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That's too bad because it's such a great bike but I wouldn't ride it.
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Old 05-13-12, 11:48 PM
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i'd have to say that it's bent... but if i had to put a straightedge to a frame to determine that it may be bent, i don't think i would worry about it. but if i KNEW it was bent? well that's another matter altogether.

hope this helps

edit: i think i read a post, not too long ago, about someone that fixed something like this by sliding a long (like 3-4 foot) 1" pipe down the headtube, immobilizing the frame, and then giving the lower end of the pipe a good yank or two, to bend the headtube, toptube and downtube back into proper alignment. maybe they will see this thread and respond.

Last edited by hueyhoolihan; 05-13-12 at 11:53 PM.
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Old 05-14-12, 08:34 AM
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I think it is too minimal to make any difference whatsoever in the strength of the frame. But you may want to check the alignment to see if anything else is out of whack. If everything is straight I wouldn't even bother with repair.
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Old 05-14-12, 09:08 AM
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I think it's safe; but I'd put 'er down. Sad.
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Old 05-14-12, 09:24 AM
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with that head tube angle, handling is bound to be a little funny. People have been using the Park frame jack for these types of repairs, but I wouldn't do it on a nice bike like this.
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Old 05-14-12, 10:35 AM
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Handling actually feels alright. The steering is probably a little twitchier than it used to be but not to the point that the bike feels unwieldy.

At this point, I'm pretty willing to fiddle with the frame since it really isn't worth much to me anymore. I don't find myself riding it much these days and I doubt I could get more than a few bucks if I were to sell it. In short, I'm trying to view this as an opportunity to experiment and learn about frame repair. People are always talking about how steel is more practical than carbon or aluminum because of its reparability, and I've even espoused that opinion myself. Here's a chance to prove it, as I see it.

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Old 05-14-12, 10:43 AM
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Originally Posted by jar351 View Post
The steering is probably a little twitchier than it used to be but not to the point that it feels unwieldy.
The increased trail should make it a little more stable than it was originally - but I doubt that it'd be enough to notice. I would remove a bit more paint from around the spot where it flaked off to make sure there's no crack starting. Then paint over that spot and keep an eye on it. But if it were mine I'd continue to ride it.
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Old 05-14-12, 10:47 AM
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Is the Park "frame jack" that long scythe-like tool with the "serrated" blue rubber boot over the hooked portion?
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Old 05-14-12, 03:09 PM
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looks like a car jack, and is no longer made. I think the "scythe-like tool" is the FFS-2, which is generally used to straighten bent forks and stays. I got bored before the ffs-2 page from Park downloaded, they must have "upgraded" their site
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Old 05-14-12, 06:22 PM
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Originally Posted by prathmann View Post
The increased trail should make it a little more stable than it was originally - but I doubt that it'd be enough to notice. I would remove a bit more paint from around the spot where it flaked off to make sure there's no crack starting. Then paint over that spot and keep an eye on it. But if it were mine I'd continue to ride it.
Steeper HTA should make for less trail, not more. If the fork rake were also effected by the crash, that could alter the trail but it appears that the fork is fairly strait, may have been bent back to original shape if it were effected by crash.
If the TT and DT do not have ripples, this crash was relativly light in comparison to others I have seen still being ridden. I wouldt be overly concerned with easy riding on it but do continually check and watch for evidence of any cracks forming. If it does break, it is likely to be gradual enough that you will first notice odd handeling, not necessarily an instentaneous failure that suddenly breaks the entire bike in half.
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Old 05-14-12, 06:41 PM
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Could try bringing it to one of the local framebuilders, see what they think (Ed Litton's in Richmond). He may be able to give you some solid advice and probably has the tools to straighten things out a bit if you choose to go that route.
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Old 05-23-12, 11:50 AM
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Originally Posted by jar351 View Post
Is the Park "frame jack" that long scythe-like tool with the "serrated" blue rubber boot over the hooked portion?
I think a couple of C&V guys have one. I remember some postings of frame getting jacked back into shape.
You could ride it as-is without worrying, or try to fix it if you can find the right tool ... or make your own.
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Old 05-29-12, 11:35 AM
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Originally Posted by zmensing View Post
Could try bringing it to one of the local framebuilders, see what they think (Ed Litton's in Richmond). He may be able to give you some solid advice and probably has the tools to straighten things out a bit if you choose to go that route.
I emailed Litton about it a few weeks ago and never heard back. Guess he doesn't really do email inquiries. I did talk to another local frame-builder about it, and his advice was to check the fork alignment and ride the frame as is. He didn't seem to think it could be bent back into shape, but then, this assessment was only based on photos. When I get the chance I'll probably take it down to Litton's shop, if only as an excuse to check that place out and have a chat with the guy. From what I've heard about his pricing, though, I don't think I'll actually be able to afford his services, certainly not if he suggests something major like a TT replacement. I'll be sure to report back after that.
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Old 06-01-12, 05:45 PM
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Originally Posted by jar351 View Post
I emailed Litton about it a few weeks ago and never heard back. Guess he doesn't really do email inquiries. I did talk to another local frame-builder about it, and his advice was to check the fork alignment and ride the frame as is. He didn't seem to think it could be bent back into shape, but then, this assessment was only based on photos. When I get the chance I'll probably take it down to Litton's shop, if only as an excuse to check that place out and have a chat with the guy. From what I've heard about his pricing, though, I don't think I'll actually be able to afford his services, certainly not if he suggests something major like a TT replacement. I'll be sure to report back after that.
Cool, a friend of mine brought a frame out there to get the forks aligned I think. I haven't asked yet how he liked it or if he actually got it back, but I think he was riding it, so I assume so. Figure you don't ever really need TOO convincing a reason to want and go check out a frame builder's shop
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