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Help! Cracked frame-mount derailleur hanger - '92 Trek 2100. Heart sunk.

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Help! Cracked frame-mount derailleur hanger - '92 Trek 2100. Heart sunk.

Old 09-08-22, 11:36 AM
  #26  
roadcrankr
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That's a real shame. I rode one of these briefly. Lovely riding machine.
I wonder if you can utilize one of these 60's/70's steel Campy hangers.
These were quite common on many frames that lacked the hanger built into the dropout.
This version indents toward the cogs, which might place your derailleur in the same position horizontally.
With the 2100's vertical dropouts, you would need to cinch it in place.
The backside is flat. You would, of course, need to saw off your existing hanger.
Only issue I see concerns your derailleur pushed a half inch aft.
Anyhow, these cost a bit used or new on eBay, when you can locate one.
I can send you a well-used one for ten bucks shipped. PM me if interested.

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Old 09-08-22, 12:17 PM
  #27  
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I'll throw in a comment... If the repair doesn't play out consider the fact that this bike could be a...

"PRIMO FIXY!!!"

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Old 09-08-22, 01:48 PM
  #28  
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I don't think it would make a good fixed gear bike because you would need to take up slack somehow and the hangar is your only choice with vertical dropouts.
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Old 09-08-22, 07:02 PM
  #29  
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Originally Posted by unterhausen
I don't think it would make a good fixed gear bike because you would need to take up slack somehow and the hangar is your only choice with vertical dropouts.
Well, there are the hubs with eccentric axles to give you a smidge of chain take-up. I forget who made those, but I have also just cut the axle flush with the ends of the locknuts, so you get 5 mm of takeup before the skewer hits the inside of the dropout slot. Just make sure your QR is tight since friction is the only thing keeping the axle from moving...
Plus Phil's eccentric BB that fits in a regular threaded BB shell, for a tad more take-up.
Finally there's the FixMeUp computer app that tells you what gear combos will work with a given chainstay length, for people with verticals and no eccentric anywhere.

Not that I'd do any of those things, I hate riding fixed on the road! Did my time, back when you had to ride fixed in the winter to train with certain clubs, but it was only under duress. The freewheel is one of the world's greatest inventions, use it people!

Mark B
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Old 09-08-22, 07:14 PM
  #30  
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You're thinking of the White Eno hub. Those are good suggestions. Also a half link.
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Old 09-11-22, 08:09 PM
  #31  
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Originally Posted by roadcrankr
That's a real shame. I rode one of these briefly. Lovely riding machine.
I wonder if you can utilize one of these 60's/70's steel Campy hangers. * * *
Good ideas, roadcrankr - thanks for offering!
I've been sizing up various derailluer hanger options either like that one to fix with the wheel...
or maybe I get some tools and learn how to grind down and shape the frame to attach a replaceable hanger.
But still investigating the welding with local metalworkers - hopefully I'll make some progress this week.
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Old 09-11-22, 08:24 PM
  #32  
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Originally Posted by bulgie
Not that I'd do any of those things, I hate riding fixed on the road! Did my time, back when you had to ride fixed in the winter to train with certain clubs, but it was only under duress. The freewheel is one of the world's greatest inventions, use it people!
LOL! I definitely don't want to give up the multi-gear transmission.
For me, starting from zero in stop and go city traffic with a fixed gear would be hard on my joints - or if I fix the gear low enough, I've got a pretty limited top speed.
Then again, people love fixies, so maybe I'm missing something.
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Old 09-13-22, 07:06 PM
  #33  
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Back in the dark ages, Cannondale’s original bikes did not have replaceable hangers, and many bikes suffered the same fate as this one.

Cannondale made a special bolt-on hanger as a fix. You would hacksaw off the offending hanger at a certain place and bolt this hanger onto the frame by drilling and tapping a couple of holes in the appropriate place. I did dozens of these, back in the day.

Whether you could find one of these nowadays is unknown. My ex-bike shop had a couple, several years ago but dunno if they are still around. I’m away for a couple of weeks so I can’t check. Mr Google might know, though.

Mark Beaver
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