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

New: Take part in the March Giveaway for HONBIKE Uni4 long-range commuter E-bike valued at $1699 ⚡


Front derailleur adjustment question
#1
Hi,

Hope this is right place to ask. I have looked through the howtos but can't see the right section for my problem.

I have a bike with a Shimano FD-M191 front derailleur which needs some adjustment. When I change up from the smallest gear to the middle one, the chain almost makes it but then doesn't, falling back to the smallest cog again and then making a loud rattling sound. The only way I can change up from the smallest to the middle gear is to "pretend" to change up to the biggest gear, then stop, allowing the chain to settle on the middle gear.
Changing from the middle gear to the largest works fine, if that helps.

There are two screws on the derailleur itself, but the old maxim of a little knowledge being a dangerous thing seems to apply here, so I am hoping someone with more experience will be able to help.

Thanks in advance.

Cheers,

Phil
  Reply
#2
What you descibe usually means the shifter cable needs more tension. There should be a barrell adjuster where the cable comes out of the shifter. Back this out in small increments to see if it improves the shifting. The two little screws set the limit for movement of the derailleur to the inside and outside. They shouldn't affect shifting to the middle ring.

If this doesn't help. Check also that the outer edge of the derailleur is parallel to the chainrings and that the derailleur isn't sitting too high (it should have only 2-3 mm of clearance above the large chainring.)

http://bikeride.com/adjust-front-derailer/
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
What are your best biking places in your...
Today 12:57 PM
Hi
Today 12:45 PM
Where are you from and What is your favo...
Today 11:50 AM
Winter Riding
Today 11:47 AM
What was your first bicycle?
Today 08:46 AM
Hi
Today 08:06 AM
Specialised Globe Vienna 4 bling bling
Today 06:31 AM
Welcome
Today 05:52 AM
Has anyone used tubeless tires without s...
03-22-2023 08:32 PM
Stretching during a ride
03-22-2023 12:04 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. ReapThaWhirlwind
29 posts
no avatar 2. ichitan
28 posts
no avatar 3. enkei
15 posts
no avatar 4. Talha
12 posts
no avatar 5. meamoantonio
12 posts