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Rear Derailleur Snapped off

Old 07-21-22, 12:42 PM
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Kade29
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Rear Derailleur Snapped off

My rear derailleur snapped off by its bolt which ended up shearing the bolt and the thread it hangs on so now I need a new derailleur as well as a new hanger for it. I have been trying to find what I need but there's a lot of options. My bike is a 21 speed (7 cogs in back and 3 in front) and the original brand derailleur was Power but they are like non existent anymore. Could any of you help me find out what to get as replacements? (Trying to stay under $35)
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Old 07-21-22, 01:22 PM
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i had to replace my hanger a few years ago. forget where i looked but you might try one of these places...

https://derailleurhanger.com/
https://wheelsmfg.com/derailleur-han...facturers.html

think it was from the latter one.
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Old 07-21-22, 01:32 PM
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A new rear DR you can get for cheap...

https://www.universalcycles.com/shop...s.php?id=88089

A DR hanger will cost you though...

https://www.universalcycles.com/search.php?q=DR+hanger

Check the specs though on the DR I've no idea what size cogs you are running but am assuming it's a fairly narrow 14- 26ish or so.

Microshift might be another good choice too for a DR on an old bike. Don't know if they make hangers.

https://www.microshift.com/
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Old 07-21-22, 02:16 PM
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What kind of bike was it. Did it have a replaceable derailleur hanger?
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Old 07-21-22, 02:21 PM
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Kade29
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Originally Posted by himespau View Post
What kind of bike was it. Did it have a replaceable derailleur hanger?
I cannot send pictures or links as of right now, so the model is (below) which can be found on the dynacraft website fairly quickly.

24" Dynacraft Gauntlet Boys' Mountain Bike

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Old 07-21-22, 02:36 PM
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Looks like your bike came with a 'claw' type rear derailleur mount - which is lucky for you because you can get inexpensive rear derailleurs with a built-in claw mount...

https://www.performancebike.com/shim...00gsb/p1279152

(example for illustration, may not be compatible with your exact bike)

A separate 'claw' mount with threads to accept a standard rear derailleur are also sold, usually quite inexpensively.

https://www.performancebike.com/sunr...bs0.hc/p590974
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Old 07-21-22, 02:54 PM
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Originally Posted by ClydeClydeson View Post
Looks like your bike came with a 'claw' type rear derailleur mount - which is lucky for you because you can get inexpensive rear derailleurs with a built-in
This option looks like it would work. I measured the claw that I have right now and it appears to be 11mm. Is that compatible?
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Old 07-21-22, 05:28 PM
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Originally Posted by Kade29 View Post
This option looks like it would work. I measured the claw that I have right now and it appears to be 11mm. Is that compatible?
Claw hangers are pretty much universal.
Cheap Shimano Tourney as linked before or a microshift will likely be better than the original.
We'll also assume if it has indexed ("click") shifting that is Shimano compatible.

Depending on what happened you may have to tweak the dropout (plate where the derailleur and wheel mount) if it got bent. 7 Speed you can eyeball and adjust with an adjustable wrench. If it's indexed shifting you'll need to do some cable adjusting to get it to index correctly (if the presumably cheesy shifters actually function decently). YouTube videos abound for mounting and adjustment.

​​​​​​https://www.rei.com/product/205273/m...ut-claw-hanger
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Old 07-21-22, 08:26 PM
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I wouldn't put the money towards that bike, if you are stuck on it just buy a new one at wally-mart. Putting a new derailleur and hanger on that bike will be more than it is worth at this point.
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Old 07-21-22, 09:21 PM
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Kade29
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Originally Posted by veganbikes View Post
I wouldn't put the money towards that bike, if you are stuck on it just buy a new one at wally-mart. Putting a new derailleur and hanger on that bike will be more than it is worth at this point.
Don't worry I bought a derailleur with a hanger attached for 17 bucks on Amazon. As much much as I would love to buy a new bike, the wallet is not thick enough for that right now.
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Old 07-22-22, 06:07 AM
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If you haven’t already, you might want to investigate what caused this catastrophe in the first place. If, for example, it was due to the chain getting jammed somehow…if that cause still exists the same thing could happen again.

Dan
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Old 07-22-22, 07:42 AM
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Originally Posted by Kade29 View Post
Don't worry I bought a derailleur with a hanger attached for 17 bucks on Amazon. As much much as I would love to buy a new bike, the wallet is not thick enough for that right now.
Put a new cable & housing on it as well.
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Old 07-22-22, 02:58 PM
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Originally Posted by _ForceD_ View Post
If you haven’t already, you might want to investigate what caused this catastrophe in the first place. If, for example, it was due to the chain getting jammed somehow…if that cause still exists the same thing could happen again.

Dan
I am pretty sure that it came from the fact that I rode on a small ditch right on my driveway and slammed the bike onto the driveway which bent a chain or two. I had thought I got them back straight but apparently not because when I tried to ride again the chain would not go and I tried to force it. I learned my lesson now and the chain is straight again.
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