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 07-07-07, 04:54 PM   #1
edchest
Newbie
Thread Starter
 
Join Date: Jul 2007
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Help choosing a replacement rear derailleur

My daughther's bike is a 21 speed mountain bike I purchased from wal-mart a few years ago. The rear derailleur was mangled by a neighbor taking out his frustrations. Anyway, I now need to replace it and no longer have the one that was removed. Here's what information I have

Shifters are on the handle bars and are the ones that click (indexing?) and the word Falcon appears on them.

Rear sprokets have following number or teeth
14-16-19-20-22-24-28

I called the local bike shop and they quoted $50 minimum for any derailleur they carry + labor and I only paid $80 for the bike. If it's going to run me that much, I'd just as soon replace the bike. Any advice on a supplier is helpful also.

Thanks,
edchest
edchest is offline   Reply With Quote
Old 07-07-07, 05:32 PM   #2
taz77
Junior Member
 
taz77's Avatar
 
Join Date: May 2007
Location: San Francisco, CA
Bikes:
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I replaced my rear derailleur on a bike from toys r us, bought about 9 years ago. Apparently, the rear derailleur isn't the same as what they have now, in that the bike frame does not have a derailleur hanger built in. I had to get a derailleur with the hanger built into the derailleur.

http://www.jensonusa.com/store/imgWr...__2.jpg&type=2
http://www.jensonusa.com/store/imgWr...BKS.jpg&type=2

If you notice the top left of each pic, you'll see the difference. My older Toys R Us 21 speed mountain bike needed the derailleur with the built in hanger like in the second pic. $13 +s/h. Cheap, but works fine for what I needed it for.
taz77 is offline   Reply With Quote
Old 07-07-07, 05:37 PM   #3
bsyptak
Luggite
 
bsyptak's Avatar
 
Join Date: Aug 2004
Bikes:
Posts: 1,906
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I believe from what I've read that those are Shimano Tourney knock-offs, and so are Shimano compatible. If so, look for a Shimano Tourney or Alivio derailleur, long cage. An 8 speed der will work fine on your 7 speed bike.

Like this: http://cgi.ebay.com/ws/eBayISAPI.dll...m=110146139519

Also, make sure that the derailleur hanger (holder) didn't also get snapped off the bike when the derailleur did. If so, you may be completely out of luck, because I doubt you will be able to find one for a $80 bike try derailleurhanger.com). This page shows you an image of a typical hanger and how to straighten it. Keep in mind if it's aluminum and bent, it might snap when you try to straighten it.

http://www.parktool.com/repair/readhowto.asp?id=39

Best o luck.
bsyptak is offline   Reply With Quote
Old 07-07-07, 06:51 PM   #4
Bill Kapaun
Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Bikes: 86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.
Posts: 9,494
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 125 Post(s)
Another option is to check the local Goodwill etc. for a donor bike. Remove what you need and "donate" the bike back.
As far as compatibility, I don't consider Falcon to be compatible with itself.
Bill Kapaun is offline   Reply With Quote
Old 07-08-07, 08:11 AM   #5
DMF 
Elitist Troglodyte
 
DMF's Avatar
 
Join Date: Jun 2006
Location: Dallas
Bikes: 03 Raleigh Professional (steel)
Posts: 6,924
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
I believe from what I've read that those are Shimano Tourney knock-offs, and so are Shimano compatible. If so, look for a Shimano Tourney or Alivio derailleur, long cage.
I have a used Tourney with built-in hanger if you determine that's what you need.
__________________
Stupidity got us into this mess - why can't it get us out?

- Will Rogers
DMF is offline   Reply With Quote
Old 07-14-07, 04:59 PM   #6
edchest
Newbie
Thread Starter
 
Join Date: Jul 2007
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks to all for your help. I ordered an inexpensive Tourney and installed it, only to find that the front sprokets (on the crank) are warped/out of plane and the chain slips off one and onto the next as it spins. I just can't win here. I'll need to fingure out whether that repair is worth the $ and effort.

Thanks again
edchest is offline   Reply With Quote
Old 07-14-07, 08:14 PM   #7
dedhed
SE Wis
 
dedhed's Avatar
 
Join Date: Apr 2005
Location: Milwaukee, WI
Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400
Posts: 3,079
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
can you get an adjustable wrench on the front chain rings and straighten them?
dedhed is offline   Reply With Quote
Old 07-14-07, 11:09 PM   #8
AlucardZero
Senior Member
 
AlucardZero's Avatar
 
Join Date: Jun 2007
Location: OC, New York
Bikes: Trek 4500, Mongoose MGX DXR(LOL)
Posts: 307
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I got a SRAM 3.0 ($20 on Amazon) and it works well... That was for my walmart bike that is now destroyed.

Also, it's not worth a repair, honestly. Cheaper to spend money on a new bike. You're going to find another problem when you fix the chainrings.
AlucardZero 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 06:28 PM.