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1985 Miyata 610 damaged frame

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1985 Miyata 610 damaged frame

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Old 05-24-14 | 08:31 PM
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Bikes: 1985 Miyata 610

1985 Miyata 610 damaged frame

Here's some photos of a 1985 Miyata 610 that has a damaged frame. Left pedal was pushed in and pushed the center of the frame out, Its about an inch off of alignment and it now has a dimple in the downtube. My question is, is this fixable? It's covered by insurance due to a car accident not being our fault. I've heard you can bend the frame back to place and since its a steel frame you will be perfectly fine but is this true? I've also heard people say to never trust a bent frame and get rid of it. This bicycle has some history to it and means something to us so I wouldn't ever sell it. I just want it back to being something safe to ride on and create new memories with it. Is it worth replacing the down tube and repainting it? If so does anyone know someone in nyc that does good work?

Attached Images
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photo 1.jpg (99.0 KB, 78 views)
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photo 2.jpg (94.6 KB, 84 views)
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photo 3.jpg (95.4 KB, 73 views)
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photo 4.jpg (92.0 KB, 80 views)
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photo 5.jpg (98.8 KB, 65 views)

Last edited by jbwilliam; 05-24-14 at 08:52 PM.
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Old 05-26-14 | 01:40 PM
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From: Bike Heaven (Sunnyvale CA)

Bikes: No-name LH drive track. Also ride an Exxon Graftek, a Masi, a Trek R200 or a RR Boneshaker for fun!

IMO, having the tube replaced would cost more than the frame is worth. The insurance will give you a couple hundred (hopefully) and maybe that would offset the cost enough to make it worth your while.

I can't legally recommend to others a "cold set" repair (where the frame is manually straightened with no tube replacement) but I had a Colnago that I "cold set" after an accident and it worked for years after that (I finally sold it with full disclosure).

Also, back in the day, many of us "cold-set" our rear triangles wider in order to change from 5-speed clusters to the 6-7-8 speed models and I never heard of any failures among my friends. BUT I am NOT recommending "cold-setting" due to fear of litigation .
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Old 05-26-14 | 01:53 PM
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From: Mans of NC & SW UT Desert

Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more

IMHO, that frame is toast. Sure, you could get tubes replaced. Up to you.
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Old 05-26-14 | 02:42 PM
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The down tube needs replacement, the rear triangle looks to be pushed to one side a little, the brake bridge looks like it cracked where it is brazed to the seat stay( might only be paint flaking off). That's a lot of work. Plus, I've always heard that brass brazed tubes shouldn't be replaced. I'm assuming that's a brass brazed frame. Brass uses much higher temps than silver. Your only cost effective option is to do as exxongraftec mentioned and try to coldset (bend) it back. I doubt anybody would do the job for you so you are probably on your own. The good news is that steel doesn't mind being bent a little and tends not to fail without warning.
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Old 05-26-14 | 03:08 PM
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I would not consider repairing this frame. Beside all the tube, joint and alignment damage the cost won't be covered by the value of the bike. Andy.
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Old 05-26-14 | 11:19 PM
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From: Eugene, OR

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Frame is shot, you can build a new one easier than repairing this one. Needs are new seat tube, down tube, chain stays. doesn't leave that much.
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