Bicycle TutorBicycle Tutor

Show off your bike!

Post Reply 

Probable derailleur problems

Related video tutorials:
How to Adjust Your Front Derailleur How to Adjust Your Front Derailleur
* Now with 3D interactive instructions
Author Message
jljack13 Offline
New Member


Posts: 1
Joined: Oct 2013
Post: #1
Probable derailleur problems
Hello, I recently purchased a western flyer freestyle 10 speed road bike for super cheap ($5) off the internet but now Im fixing it up to make it road ready and keep running into problems. The one i am particularly having trouble with is the rear derailleur, which is a Shimano positron II. It seems like the derailleur does not have to pull to pull the chain back into riding (have not actually ridden it due to safety concerns but moved the petals) resulting in extra slack. also only one of the pulleys actually touches the chain. Can I fix this or do i need to purchase a new one if so which one I am wanting to keep cost as low as possible just looking to be able to travel ~10 miles on roads at a decent speed. Would this one work: http://www.nashbar.com/bikes/Product_10053_10052_533510_-1___202435
Oct 3, 2013 10:27 PM
Find all posts by this user Quote this message in a reply
1FJEF Online
Veteran Member

Northern Mexico (Central CA)
Posts: 583
Joined: May 2011
Post: #2
RE: Probable derailleur problems
(Oct 3, 2013 10:27 PM)jljack13 Wrote:  Shimano positron II. It seems like the derailleur does not have to pull to pull the chain back into riding (have not actually ridden it due to safety concerns but moved the petals) resulting in extra slack. also only one of the pulleys actually touches the chain.
You have typing or translation errors, so I don't understand the questions, but it sounds like the chain is routed incorrectly. Also that is not a cheap rear derailleur (RD), you can find them for half that, but we need a clear picture of the RD & RD hanger so we can tell what will fit, & if a short cage is OK.
Oct 4, 2013 05:54 AM
Find all posts by this user Quote this message in a reply
nfmisso Offline
Veteran Member

San Jose, CA
Posts: 2,060
Joined: Jul 2010
Post: #3
RE: Probable derailleur problems
This one will work:
http://www.amazon.com/Shimano-Tourney-TX35-Derailleur-Speed/dp/B003ZMH69S/

But; you may need different shifters.

Nigel
Oct 4, 2013 09:30 AM
Find all posts by this user Quote this message in a reply
DaveM Offline
Veteran Member


Posts: 1,297
Joined: Aug 2008
Post: #4
RE: Probable derailleur problems
(Oct 4, 2013 09:30 AM)nfmisso Wrote:  But; you may need different shifters.

If it's a "Positron" system, you'll definitely need a new cable, maybe shifters. The positron systems don't rely as much on the back pull of the spring in the derailleur to pull it in to higher gears. You "push" the derailleur with the shifter which is why they use a solid, wire like gear cable instead of a normal one. I've never tried a positron shifter with a normal der, but it might work.
Oct 4, 2013 09:39 AM
Visit this user's website Find all posts by this user Quote this message in a reply
Post Reply 


Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Trouble with chain & rear derailleur pulleys generic_cyclist 5 498 Apr 11, 2014 10:35 PM
Last Post: generic_cyclist
  Front derailleur dakawan 3 398 Apr 5, 2014 01:18 PM
Last Post: dakawan
  Shimano TX35 Rear Derailleur Ebernal32 5 432 Apr 3, 2014 12:11 PM
Last Post: Ebernal32
  Rear derailleur problem, chain rubbing the lower pulley cage grandmaster 15 1,298 Mar 18, 2014 07:54 PM
Last Post: grandmaster
  Tiagra Rear Derailleur Won't Shift CheddarExpress 2 711 Feb 20, 2014 12:33 AM
Last Post: Joe_W
  Cable on front derailleur keeps getting damaged BigRiz 2 623 Feb 9, 2014 09:17 AM
Last Post: BigRiz
  SRAM X0 trigger shifter with Shimano Front Derailleur? gregw 6 1,837 Jan 28, 2014 07:58 PM
Last Post: gregw
  Shimano 105 - Rear Derailleur Problem RunningBehind 7 1,554 Jan 27, 2014 05:48 PM
Last Post: RunningBehind
  Suntour derailleur missing a spring? sgodwin 5 835 Jan 25, 2014 10:12 AM
Last Post: cny-man
  Derailleur catches NBuzz83 1 677 Jan 25, 2014 10:09 AM
Last Post: cny-man

Forum Jump:


RSS Forum RSS Feeds / Powered by MyBB

ISSN 1918-3445 © Copyright 2007-2010 Bicycle Tutor / Privacy Policy

feed