Question on replacing the rear derailleur
07-13-20, 08:42 PM
#1
Newbie
Thread Starter
Join Date: Jul 2020
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Question on replacing the rear derailleur
My son managed to break the derailleur of his Mongoose mountain bike without any accident. I was surprised to notice that the piece that connected the derailleur to the hanger was actually made out of plastic (obviously didn't pay attention when I assembled it).
I located the direct replacement based on the model number but I am a bit hesitant to get yet another plastic one. I understand it's designed to break without harming the frame but biking around the neighborhood didn't really stress it so wondering if another 7-speed derailleur will work. How do I identify a compatible one? I see many options within the same price range without the plastic part.
Can't post any links or photos yet. Here is the derailleur - amazon com/INKESKY-Shimano-Derailleur-RD-TZ31-Mountain/dp/B07GV14SLS/
Thanks for any suggestions.
I located the direct replacement based on the model number but I am a bit hesitant to get yet another plastic one. I understand it's designed to break without harming the frame but biking around the neighborhood didn't really stress it so wondering if another 7-speed derailleur will work. How do I identify a compatible one? I see many options within the same price range without the plastic part.
Can't post any links or photos yet. Here is the derailleur - amazon com/INKESKY-Shimano-Derailleur-RD-TZ31-Mountain/dp/B07GV14SLS/
Thanks for any suggestions.
07-14-20, 11:35 AM
#2
Senior Member
Join Date: Sep 2006
Location: Napa Valley, CA
Posts: 908
Bikes: Wife says I have too many :-)
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 327 Post(s)
Liked 250 Times
in
158 Posts
I would duplicate the piece out of a piece of aluminum flat bar if its possible.
07-14-20, 03:33 PM
#3
Senior Member
Join Date: Feb 2015
Location: Mission Viejo
Posts: 5,806
Bikes: 1986 Cannondale SR400 (Flat bar commuter), 1988 Cannondale Criterium XTR, 1992 Serotta T-Max, 1995 Trek 970
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 1944 Post(s)
Liked 2,164 Times
in
1,323 Posts
Get a universal claw derailleur hanger/adapter and then get any 7-9 speed derailleur. An older Deore/LX, or similar, (eBay) out of the 90’s and be done with it.
John
John
Likes For 70sSanO:
07-14-20, 04:57 PM
#4
Newbie
Thread Starter
Join Date: Jul 2020
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
07-14-20, 05:30 PM
#6
Newbie
Thread Starter
Join Date: Jul 2020
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
