Reply With Quote
you need to know if your bike requires a braze on derailleur or a clamp on derailleur... you'll be able to get either type in any of the groups though. It also makes a difference if you have a double or triple crankset (triple requires a longer der?), and **I think** (someone may have to correct me here) it makes some difference how many speeds you are running in back, because some der's are narrower/wider to accomodate different chain angles (that result from different rear-cog spacing) without rubbing. Not sure about this last though.
you should be able to find something compatible with your bike in each of the groups, but not every derailleur in each group will be an ideal choice, if that makes sense.
chain dropping (especially on a hill) can be related to adjustment (so it may not be something inherently wrong with your derailleur) and it can also very much be related to shifting technique. you really have to let up to get a good downshift while climbing. that said, I have a 105 triple fd on one of my bikes and, while it doesn't drop my chain when it's adjusted properly, it's also just a little sluggish and sloppy compared to my Ultegra triple fd.
Welcome guest, is this your first visit? Click the "Create Account" button now to join.
Results 1 to 9 of 9
Thread: Replacing Derailleur
-
03-27-2008, 10:02 AM #1
Registered User
- Join Date
- Oct 2006
- Location
- Little Rock, AR
- Posts
- 49
Replacing Derailleur
To disable ads, please log-in.
I currently have a Tiagra front derailleur on my 2005 specialized vita and I would like smoother shifting. (I have dropped my chain several times after climbing)
What would I need to know in order to upgrade? All of my other components are 105.
I guess my question is, are all Derailleur's compatible with my bike? I am specifically looking at Ultegra or Dura Ace."You must do the thing you think you cannot do." --Eleanor Roosevelt
Pain is temporary. It may last a minute, or an hour, or a day, or a year, but eventually it will subside, and something else will take its place. If I quit, however, it lasts forever. -Lance Armstrong
-
03-27-2008, 10:16 AM #2
Faster, faster!
- Join Date
- Aug 2006
- Location
- Vermont
- Posts
- 1,414
Last edited by VeloVT; 03-27-2008 at 10:21 AM.
-
03-27-2008, 10:20 AM #3
Registered User
- Join Date
- Oct 2006
- Location
- Little Rock, AR
- Posts
- 49
Looks like mine is a clamp-on. Thanks for your help!
"You must do the thing you think you cannot do." --Eleanor Roosevelt
Pain is temporary. It may last a minute, or an hour, or a day, or a year, but eventually it will subside, and something else will take its place. If I quit, however, it lasts forever. -Lance Armstrong
-
03-27-2008, 10:44 AM #4
Registered User
- Join Date
- Mar 2008
- Posts
- 2,698
Check the clamp diameter- they come in a couple of different sizes. A triple FD has a wider/taller inside plate to help deal with the difference in chainring size.
Originally Posted by JLZimrmn
Like Liza said, it may just be an adjustment issue that can be readily fixed. All that's needed (usually) is a phillips head screwdriver, maybe a 5mm allen key, and lots of patience. Check out http://www.parktool.com/repair/readhowto.asp?id=75 for instructions
-
03-27-2008, 11:21 AM #5
Registered User
- Join Date
- Oct 2006
- Location
- Little Rock, AR
- Posts
- 49
I have adjusted it and it did help but I still find that it is really hard to shift up from the small to middle chain ring.
I always thought that all of my components were 105 until I took a closer look and saw that this part was Tiagra.
Thanks for the feedback guys."You must do the thing you think you cannot do." --Eleanor Roosevelt
Pain is temporary. It may last a minute, or an hour, or a day, or a year, but eventually it will subside, and something else will take its place. If I quit, however, it lasts forever. -Lance Armstrong
-
03-27-2008, 05:49 PM #6
Ooo, talk tri to me!
- Join Date
- Jul 2006
- Location
- Olney, MD
- Posts
- 3,063
You also need to check if it's top pull or bottom pull (the direction from which the cable attaches). I think most are bottom pull.
I'd rather be swimming...biking...running...and eating cheesecake...
--===--
2008 Cervelo P2C Tri bike
2011 Trek Madone 5.5/Cobb V-Flow Max
2007 Jamis Coda/Terry Liberator
2011 Trek Mamba 29er
-
03-27-2008, 07:38 PM #7
Inner Geekette
- Join Date
- Aug 2003
- Location
- Bendemonium
- Posts
- 9,673
A Deda Dog Fang can help also.
Frends know gud humors when dey is hear it. ~ Da Crockydiles of ZZE.
-
03-27-2008, 07:41 PM #8
Registered User
- Join Date
- Oct 2006
- Location
- Little Rock, AR
- Posts
- 49
My bike actually came with a dog fang and the dang chain still dropped. Thanks everybody for the suggestions.
"You must do the thing you think you cannot do." --Eleanor Roosevelt
Pain is temporary. It may last a minute, or an hour, or a day, or a year, but eventually it will subside, and something else will take its place. If I quit, however, it lasts forever. -Lance Armstrong
-
03-28-2008, 04:45 AM #9
Queen of All I Survey
- Join Date
- Jun 2006
- Posts
- 2,506
One thing I discovered on shifting 105 or lower into a higher ring on the front is to make sure that in the back you are at least in the middle of the cassette. It seems that if you are in the lower gears in the back, the chain angle encourages the drop. So I've made it a habit to shift up once or twice in the back before shifting up in the front.
