Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-14-12, 08:29 PM   #1
yothere
Newbie
Thread Starter
 
Join Date: Sep 2012
Bikes:
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Rear Derailleur replacement question

Hello everyone!
I've been searching around the forum for a while for a solution to my particular issue but haven't found anything. I don't know much about bikes but have been trying to educate myself...

I have a Schwinn mountain bike and I need to replace its rear derailleur. It came with a Shimano Tourney RD-TX51. I haven't been able to find it online and have found the Shimano Tourney TX55 and the Shimano Tourney TX75 online. I assume the TX51 that originally came on the bike has been discontinued.

I've looked up the specs for the TX51 that came on the bike originally on the Shimano site and have been trying to find a match for it using the specs of the TX55 and TX75 but haven't been able to do so. The Shimano site doesn't list the detailed specs of the TX55 and TX75 on their site like they did for the TX51's.

I believe that the new (TX55 and TX75) derailleurs don't have as long a cage as the old TX51 I have. Would that make a difference?

Amazon's info on the TX55 says that it has:
Longest Cog: 34 teeth
Chain Wrap Capacity: 43 teeth

These two numbers match the information on the original TX51's information sheet on Shimano's site:
Rear largest sprocket: 28-34T
Total Capacity: 43T

I assume I'm looking at the same information about both.

So the question is which derailer can I buy? What information should I be looking for when trying to find a replacement?

I don't need anything fancy, I just use the bike to go to school and back, 4 mile commute every day. And what it came with originally sufficed me very well.

Thank you for any assistance you can provide!
yothere is offline   Reply With Quote
Old 09-14-12, 09:31 PM   #2
cyclist2000
Senior Member
 
cyclist2000's Avatar
 
Join Date: Sep 2009
Location: Up
Bikes: Masi (retired), Giant TCR, Eisentraut, Jamis Aurora Elite, Zullo (trainer bike), Cannondale, 84 Stumpjumper, Waterford(N+1), Tern D8 (N+1), looking for a Ti frame
Posts: 3,128
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 22 Post(s)
The question is

What is the total capacity that you have on your bike and what size is the rear sprocket largest cog?
cyclist2000 is offline   Reply With Quote
Old 09-14-12, 10:25 PM   #3
oddjob2 
Still learning
 
oddjob2's Avatar
 
Join Date: May 2012
Location: North of Canada, Adirondacks, NNJ
Bikes: Too many
Posts: 10,099
Mentioned: 21 Post(s)
Tagged: 2 Thread(s)
Quoted: 279 Post(s)
Looks like you found an exact match. Go for it! If you get it from Amazon or a reputable online retailer, just be sure they take returns if you don't like the TX55.
__________________
Life is like riding a bicycle. To keep your balance you must keep moving. Albert Einstein
2016 Additions: 1981 Miyata 1000, 1981 Schwinn Voyageur 11.8 chrome, Schwinn Paramount 50th Anniversary, Dawes Galaxy, Raleigh International, 1985 Raleigh Alyeska
oddjob2 is offline   Reply With Quote
Old 09-14-12, 11:01 PM   #4
dddd
Ride, Wrench, Swap, Race
 
dddd's Avatar
 
Join Date: Jan 2010
Location: Northern California
Bikes: Cheltenham-Pederson racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Posts: 5,069
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Also make sure that if your bike requires a mounting claw, that the derailer comes with a compatible one. The old one may not be compatible with a newer version of derailer, even if they both are called Tourney.
dddd is offline   Reply With Quote
Old 09-14-12, 11:13 PM   #5
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Posts: 26,913
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 212 Post(s)
Quote:
Originally Posted by dddd View Post
Also make sure that if your bike requires a mounting claw, that the derailer comes with a compatible one. The old one may not be compatible with a newer version of derailer, even if they both are called Tourney.
^^^^^
The Tourney derailleur comes both ways (with and without the hanger "claw") so be sure you get whichever one matches what your bike had before.
Retro Grouch is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 01:58 AM.