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Replacement fork for Concorde Mistral?

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Replacement fork for Concorde Mistral?

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Old 07-12-10, 10:07 AM
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Primitive Don
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Replacement fork for Concorde Mistral?

I've been enlisted to help choose a replacement chrome fork for a late 80s Columbus-tubed Concorde Mistral, brought back by a soldier who'd been stationed in Europe at that time. The current fork is missing a number of threads near the top of the steerer, and the headset cannot be fully tightened.

Here is a pic of a similar bike, posted on thecycleway.com



I need at least 220 mm of steertube, 1" threaded, for a recessed nut. The owner is aware it is a nice bike, and wants something similar to the current fork that fits the aesthetics and ride qualities of the bike. Would love your thoughts on the fork rake and ride characteristics.

When I look at my J&B and QBP catalogs, I see a number of cheap replacement forks (that are quite homely) and a number of high end carbon offerings. Can you suggest anything in the middle? Wholesale, retail, ebay, website, whatever.

Thanks for your help!

PD
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Old 07-12-10, 10:29 AM
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Any chance you could use the original fork with a headset with less stack height? That'd be cheaper (and maybe easier to find) than a fork.

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Old 07-12-10, 10:36 AM
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+1 Shimano headsets typically have short stack heights.
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Old 07-12-10, 10:39 AM
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Hmm. The damage is about 6-8 threads down. Do think a shorter stack would clear that?
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Old 07-12-10, 10:53 AM
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Originally Posted by Primitive Don View Post
Hmm. The damage is about 6-8 threads down. Do think a shorter stack would clear that?
depends on what the "damage" to the threads is...maybe just a clean-up with a die would do it. I've seen some pretty ugly threads actually work just fine, but YRMV.
Otherwisely, PM me (a little later in the week, maybe) and I may have a fork that might serve.
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Old 07-12-10, 11:32 AM
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There are 2-3 threads that are mostly gone. Looks pretty grim. Will try to get a photo up tonight.
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Old 07-12-10, 02:02 PM
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also there's a guy in Hungary that has tons of NOS and good condition european frames and forks

I can't remember his website off the top of my head and my googling skills are lacking so i can't find it, but maybe somebody knows what I'm talking about and can help
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Old 07-12-10, 02:32 PM
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Originally Posted by bane View Post
also there's a guy in Hungary that has tons of NOS and good condition european frames and forks

I can't remember his website off the top of my head and my googling skills are lacking so i can't find it, but maybe somebody knows what I'm talking about and can help
I think I know who you mean, I got my Triomphe group from him

if I need a replacement fork this would top the list. chrome straight blades, three lengths in threaded and threadless 1"
http://store.somafab.com/sostbltrfo.html
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Old 07-12-10, 03:44 PM
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^ looks nice ^

Wondering though how going to a straight blade fork would influence the ride quality? Also, wondering how a straight-blade fork can have a rake of 41 mm? Please forgive my ignorance.
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Old 07-12-10, 04:08 PM
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The fork can probably be repaired. Just add some brass to the area of the missing threads and re-cut them. BTW, nice bike!

Fork rake is the offset from the axle to the line defined by the headtube. If the fork blades are straight they are attached at an angle to the steer tube to get the desired rake.
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Old 07-12-10, 07:05 PM
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+10 Shorter headset, or get threads recut, or build up thread area. Worst comes to worst, I would have a framebuilder splice that steering tube before I replaced it. Bike is too nice to loose the original fork at this point.
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Old 07-13-10, 12:30 AM
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Good suggestions. I will investigate getting the threads repaired if that is a possibility.
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Old 08-02-10, 08:34 AM
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Update:

Just wanted to send a hearty thank you to forum member GrayJay, who generously offered up an original Columbus fork from his 1986 Concorde Aquila that was retired years ago due to a broken chainstay. He kept this fork for a number of years, and after reading my thread, offered up the fork in hopes that it be united with another Concorde frame.

The fork Jason sent seems nearly identical to the original but has the great Concorde 'C' engraving with the bird motif that the original did not. Luckily the steerer was 10 mm longer than needed and had sufficient threads to use on the 23" Mistral frame. Needless to say, I was a bit nervous measuring and cutting the steerer on this one, but the steer length was perfect and the headset installed easily.

I very much enjoyed my test rides of the bike, and got a better sense of why people love these European Columbus-tubed bikes. For those interested, the serial number appears to be 948168 or 948188.

Thanks again, Jason! I am continually amazed at the generosity of C&V forum members.





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Old 08-02-10, 08:49 AM
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Glad you got it worked out! The bike looks wonderful

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