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 03-08-14, 09:46 AM   #1
jonnymc
Newbie
Thread Starter
 
Join Date: Mar 2014
Bikes:
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
terrible problem with rear derailleur

Hi Everyone,
got a real problem with rear derailleur, which i cant fix. when the chain is on the largest sprocket, one click of the changer makes it jump to the 3rd sprocket, missing out the first, and its the same problem when coming back up. Any ideas on how to fix this?
Thanks
jonnymc is offline   Reply With Quote
Old 03-08-14, 10:09 AM   #2
BikeAnon
Senior Member
 
Join Date: Feb 2014
Bikes:
Posts: 176
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Welcome! Give us details on the model/type of der and shifters.

The setup PDFs on Shimano's site are great. You follow the steps to get things set up, and everything just plain works.
BikeAnon is offline   Reply With Quote
Old 03-08-14, 10:46 AM   #3
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 29,407
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 80 Post(s)
You have to be more clear in your description.

Just guessing you mean with the chain on the outer chainring (up front), you're having the chain skip the 2nd smallest sprocket and jumping from the smallest to the third.

If so, it could be a simple trim adjustment using the barrel adjuster on the RD. There are plenty of turorials on how to adjust the RD so I'm not going to reinvent the wheel here. But I suggest that it's possibly related to a slightly bent hanger so before simply adjusting take the extra step of checking the inner gear limit. Do so by hanging the bike or having a friend hold it up while you turn the pedals and shift to low by pushing the inner body of the RD all the way in. It should be impossible to push so far that the chain shifts over the top of the innermost sprocket.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Old 03-08-14, 11:22 AM   #4
lopek77
Banned
 
Join Date: Sep 2010
Location: lower mitten
Bikes: With round 700c & 26" wheels
Posts: 1,555
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
https://www.youtube.com/watch?v=g_bG...e_gdata_player

Google or YouTube for more...there is a lot of helpful resources online. I hope its an easy fix for you. Good luck and let us know.
lopek77 is offline   Reply With Quote
Old 03-08-14, 11:56 AM   #5
cny-bikeman 
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Bikes: 2008 Novara Randonee - love it. Would have more bikes if I had time to ride them all. Previous bikes: 1968 Motobecane Mirage, 1972 Moto Grand Jubilee (my fav), Jackson Rake 16, 1983 C'dale ST500.
Posts: 6,235
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
For clarity's sake the items on the rear cluster (cassette or freewheel) are called cogs and the front are called chainwheels or chainrings. "Sprockets" is too often used for either and is therefore confusing. If you are saying that the chain skips over the 2nd largest cog in the rear when shifting in either direction yours is not a simple adjustment problem. But what you said is not clear, because you said it jumps to 3rd cog, missing the 1st - seems like it should be the 2nd it's skipping. Please use smallest, largest, 2nd smallest instead of 1st, 2nd etc. and explain the problem again. Thanks.
__________________
There's no such thing as a routine repair.

Don't tell me what "should" be - either it is, it isn't, or do something about it.

If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

Please take the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!

Last edited by cny-bikeman; 03-15-14 at 06:28 AM.
cny-bikeman is offline   Reply With Quote
Old 03-11-14, 03:53 PM   #6
icon_cycles
Junior Member
 
Join Date: Mar 2014
Location: East london
Bikes:
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It could be that the shifter and derailleur are not compatible if one of them is new. Some Sram parts will not work with Shimano as the activation ration is different.
icon_cycles is offline   Reply With Quote
Old 03-14-14, 10:57 PM   #7
ickyicky
Junior Member
 
Join Date: Jun 2013
Bikes:
Posts: 16
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you have a replaceable hanger, be sure it's bolted on tight. I had a weird skip from 7-5 that was caused by that.
ickyicky is offline   Reply With Quote
Old 03-15-14, 12:36 AM   #8
dabac
Senior Member
 
Join Date: Mar 2008
Bikes:
Posts: 5,360
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Quote:
Originally Posted by cny-bikeman View Post
For clarity's sake the items on the rear cluster (cassette or freewheel) are called cogs .
I don't like that. Cogs engage other cogs, sprockets engage a chain. The only ones who'll regularly call chainrings sprockets are the BMX crowd, and possibly some reformed motorcyclists.
dabac is offline   Reply With Quote
Old 03-15-14, 01:14 AM   #9
3alarmer
Can'tre Member
 
3alarmer's Avatar
 
Join Date: Nov 2010
Location: The Big Tomato
Bikes: old ones
Posts: 13,743
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 299 Post(s)
.
.
...terrible problems: My dog died, I'm being evicted, my wife wants a divorce, some ****er stole my bike, I have a terminal disease.

....relatively minor problems: my rear derailleur is out of whack.
3alarmer is offline   Reply With Quote
Old 03-15-14, 02:11 AM   #10
lopek77
Banned
 
Join Date: Sep 2010
Location: lower mitten
Bikes: With round 700c & 26" wheels
Posts: 1,555
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ickyicky View Post
If you have a replaceable hanger, be sure it's bolted on tight. I had a weird skip from 7-5 that was caused by that.
It's an excellent tip that I didn't see in any previous threads I saw so far. You right...that bolt likes to get lose from time to time, and it will create shifting issues.
I keep forgetting to put some Loctite threadlocker on that bolt.
lopek77 is offline   Reply With Quote
Old 03-15-14, 05:10 AM   #11
cny-bikeman 
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Bikes: 2008 Novara Randonee - love it. Would have more bikes if I had time to ride them all. Previous bikes: 1968 Motobecane Mirage, 1972 Moto Grand Jubilee (my fav), Jackson Rake 16, 1983 C'dale ST500.
Posts: 6,235
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
Quote:
Originally Posted by dabac View Post
don't like that. Cogs engage other cogs, sprockets engage a chain. The only ones who'll regularly call chainrings sprockets are the BMX crowd, and possibly some reformed motorcyclists.
Yes but convention usually trumps accuracy. Sheldon didn't like the spelling of derailleur, but that did not change it. I wasn't saying one should use "sprocket" - the opposite. I said it's used too often.
__________________
There's no such thing as a routine repair.

Don't tell me what "should" be - either it is, it isn't, or do something about it.

If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

Please take the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!

Last edited by cny-bikeman; 03-15-14 at 06:08 AM.
cny-bikeman is offline   Reply With Quote
Old 03-15-14, 05:33 AM   #12
xenologer
Senior Member
 
Join Date: Aug 2008
Bikes:
Posts: 2,052
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by cny-bikeman View Post
Sheldon didn't like the spelling of derailleur, but that did not change it. I wasn't saying one should use "sprocket" - the opposite. I said it's used too often.
...well I call it a derailer...



assuming OP is correlating size with numeric indicator on shifter display
such behavior of skipping 2nd is common with a 'megarange' freewheel and rear derailer bent inwards

Last edited by xenologer; 03-15-14 at 05:38 AM.
xenologer is offline   Reply With Quote
Old 03-15-14, 06:25 AM   #13
cny-bikeman 
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Bikes: 2008 Novara Randonee - love it. Would have more bikes if I had time to ride them all. Previous bikes: 1968 Motobecane Mirage, 1972 Moto Grand Jubilee (my fav), Jackson Rake 16, 1983 C'dale ST500.
Posts: 6,235
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
Good point, but the problem is that the answers here contain words like "assuming" "just guessing," "could be" etc because the OP has not come back to clarify. Garbage in, garbage out.
__________________
There's no such thing as a routine repair.

Don't tell me what "should" be - either it is, it isn't, or do something about it.

If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

Please take the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!
cny-bikeman is offline   Reply With Quote
Old 03-15-14, 06:20 PM   #14
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,776
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 36 Post(s)
Quote:
Originally Posted by 3alarmer View Post
.
.
...terrible problems: My dog died, I'm being evicted, my wife wants a divorce, some ****er stole my bike, I have a terminal disease..
Sounds like the lyrics to any number of Country & Western songs.
HillRider is offline   Reply With Quote
Old 03-15-14, 06:41 PM   #15
curbtender
Senior Member
 
curbtender's Avatar
 
Join Date: Mar 2007
Location: SF Bay Area, East bay
Bikes: Marinoni, Kestral 200 2002 Trek 5200, KHS Flite, Koga Miyata, Schwinn Spitfire 5, Schwinn Speedster, Mondia Special, Univega Alpina
Posts: 3,852
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Quote:
Originally Posted by HillRider View Post
Sounds like the lyrics to any number of Country & Western songs.
Charles Barkley "That's Turrible." - YouTube
curbtender 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 02:54 AM.