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


front derailleur won't go largest cog
#1
Hi, I had a shimano 505 front derailleur, when the shifter in 3, it won't go to largest cog, stay in middle cog, the cable is tight enough, if I pull the cable manfully, it will go to the largest cog. here is pictures, who can help me to fix it?

peter

[Image: img_20210621_183438-jpg.595189]
[Image: img_20210621_183435-jpg.595191]
[Image: img_20210621_183534-jpg.595192]
[Image: img_20210621_183522-jpg.595193]
  Reply
#2
(06-21-2021, 07:03 PM)Peter Wang Wrote:  Hi, I have a shimano 505 front derailleur, when the shifter is in 3, it won't go to largest cog, stays in middle cog, the cable is tight enough, if I pull the cable manually, it will go to the largest cog. here are pictures. Who can help me to fix it?

Hi Peter and welcome,

The FD is a C050 model. Your shifter cable may have too much slack possibly from stretching. Shift the derailleur onto the smallest gear and continue until the derailleur cage stops moving inward. If the cable has slack, you may be able to remove it by adjusting the cable tension at the shifter (grip?) and/or cable stop if it has a barrel adjusters. I think some Shimano grip shifters have a means of unclamping the cable at the shifter barrel adjuster where there is a set screw or some sort of fastener that can be loosened up to remove excess cable slack. If none, or if there is not enough adjustment available; loosen up the cable clamp nut/bolt on the derailleur and try to pull any slack out of the cable. Check your innermost and outermost cage movement to ensure you won't drop a chain because the low and high limit screws are improperly set. A little lubricant on the cage and control arm pivots might not hurt either (or remove and completely service the FD). You might want to post a photo of that shifter (grip?) to give us an idea as to adjustment options.
If you can't get it straightened out, it should be a quick, easy, and inexpensive fix at a shop barring any damage to the derailleur or other related components excepting the cable itself which low in cost.

Good luck.
  Reply
#3
Forgot to ask it the bike has been in an accident or stored outside exposed to the elements. Both could be directly or indirectly related to your present, and I assume only, problem.
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
The great thing about trikes
Today 02:59 AM
Raleigh Sports Serial Number
Today 02:34 AM
Safest bike helmets
07-11-2025 10:13 AM
Braking: What is your GoTo braking metho...
07-11-2025 09:54 AM
Tour de FRANCE 2025
07-11-2025 08:57 AM
Tubeless vs. tubes: What are the pros an...
07-11-2025 02:23 AM
Pros & Cons of presta valve vs schrader ...
07-10-2025 11:58 AM
Full Moon Ride - Sunshine Coast
07-08-2025 10:46 PM
Continued learnings from bikepacking
07-08-2025 10:40 PM
What are the pros and cons of using a 26...
07-08-2025 10:35 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. Flowrider
23 posts
no avatar 2. GirishH
22 posts
no avatar 3. meamoantonio
18 posts
no avatar 4. enkei
15 posts
no avatar 5. Jesper
14 posts