Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the July Giveaway for VTUVIA SN100 Camouflage Fat Tire E-Bike $1679


Is my chain too long?
#1
I'm hoping you guys can help me.

I picked up a road bike for someone and was going thru it just to make sure everything was ok with it. It won't up-shift from the lowest gear on the rear derailleur. When it's in first gear the bogey wheel is right down on the sprocket - and I think that's what's preventing it from shifting. The derailleur has no B-screw adjustment. Can I correct it by shortening the chain?

Thanks!
  Reply
#2
pictures needed. more information about the derailleurs and bike needed.

probably not a good idea to shorten the chain.
Nigel
  Reply
#3
Thanks Nigel,

Here are photos of the rear derailleur and drive train:

http://i600.photobucket.com/albums/tt86/scoostraw/inlet%20hosting/derailleur_6.jpg

http://i600.photobucket.com/albums/tt86/scoostraw/inlet%20hosting/derailleur.jpg

http://i600.photobucket.com/albums/tt86/scoostraw/inlet%20hosting/derailleur_2.jpg

http://i600.photobucket.com/albums/tt86/scoostraw/inlet%20hosting/derailleur_5.jpg

http://i600.photobucket.com/albums/tt86/scoostraw/inlet%20hosting/derailleur_3.jpg

http://i600.photobucket.com/albums/tt86/scoostraw/inlet%20hosting/derailleur_4.jpg

I eliminated the shifter cable as a cause by disconnecting it. It just doesn't want to come off the large cog by itself. A nudge by hand and it is fine - the spring in the derailleur will then pull it all the way onto the smallest cog.

If you have any thoughts I would appreciate it.

Thanks.
  Reply
#4
Based on this:
http://i600.photobucket.com/albums/tt86/scoostraw/inlet%20hosting/derailleur_4.jpg

it is time to replace the derailleur; because it's internal springs are no longer working properly. You could try rebuilding it, but the replacement springs would probably cost more than a new derailleur if you could find the right spring(s).
Nigel
  Reply
#5
If I don't rebuild it, can you point me in the right direction regarding an inexpensive modern replacement? This bike has 5 speeds on the hub. - Ken
  Reply
#6
Any 5/6/7 speed Shimano derailleur will work for you.

This one for example:
http://www.amazon.com/Shimano-Tourney-TX55-Derailleur-Speed/dp/B003ZMH69S/

My commuter has a TX51; recently replaced in their line by the TX55; works well.

You should also replace the chain at the same time; follow the instructions that come with the derailleur to set the chain length.
Nigel
  Reply
#7
(07-20-2011, 11:07 PM)nfmisso Wrote:  Any 5/6/7 speed Shimano derailleur will work for you.

This one for example:
http://www.amazon.com/Shimano-Tourney-TX55-Derailleur-Speed/dp/B003ZMH69S/

My commuter has a TX51; recently replaced in their line by the TX55; works well.

You should also replace the chain at the same time; follow the instructions that come with the derailleur to set the chain length.

Nigel,

You were 100% correct. My LBS sold me a Shimano RD-TY18 GS derailleur for $10. It bolted right up and works perfectly. Here is my "after" photo:

http://i600.photobucket.com/albums/tt86/scoostraw/inlet%20hosting/shimano_derailleur.jpg

What is the main difference between this one and the one you mentioned?

Thanks again.
  Reply
#8
The RD-TY18 was discontinued several years ago - but other than that, there aren't any significant differences.
Nigel
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
7,499
12-10-2016, 10:46 PM
Last Post: ccronin4
 
3,006
06-04-2013, 05:34 AM
Last Post: DaveM
 
12,390
05-22-2010, 05:42 PM
Last Post: trevgbb

Forum Jump:

[-]
10 Latest Posts
Lock ring clearance
Yesterday 09:42 PM
Vairas vintage bicycle brand
Yesterday 04:06 PM
New Stator For My Ride1up Core 5
Yesterday 03:56 PM
2022 road cycling season
Yesterday 03:45 PM
Harvest Rush Gravel Grinder! $1,000 cash...
Yesterday 03:38 PM
Why should I buy an e-bike?
Yesterday 02:07 PM
New user
Yesterday 01:27 AM
Need Help identifying a Beach Cruiser
08-06-2022 07:40 PM
Derailleur causing issues
08-06-2022 01:19 PM
Wheel not turning
08-06-2022 01:12 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. ichitan
19 posts
no avatar 2. Jesper
19 posts
no avatar 3. ReapThaWhirlwind
18 posts
no avatar 4. JamesKim
11 posts
no avatar 5. dinh thaihoang
6 posts