Go Back  Bike Forums > Bike Forums > Mountain Biking
Reload this Page >

Rear Mech - need some advice PLEASE

Mountain Biking Mountain biking is one of the fastest growing sports in the world. Check out this forum to discuss the latest tips, tricks, gear and equipment in the world of mountain biking.

Rear Mech - need some advice PLEASE

Old 05-08-06, 02:40 AM
  #1  
Riles
Senior Member
Thread Starter
 
Join Date: Nov 2005
Posts: 289
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Rear Mech - need some advice PLEASE

Turns our the the rear Mech I bought is different to the one I currently have on my other bike - shud hv checked before I bought.

On my first bike I have an XT which is the the one that when the cable tension is increased the chain is moved inwards towards the larger cogs. The new XT one I bought is reverse to that, i.e increasing cable tension moves chain to the outside, smaller cogs.

So now I know there are different types of XT derailleur - is one better for shifting that the other or is simply preference ?

If it is preference I will stick with the one I am used to, therefore, what is XT type called that moves the chain inwards when tension is increased.

Also, how do I know if I need a long or short cage for the new bike I am putting together ?

THANKS !
Riles is offline  
Old 05-08-06, 03:04 AM
  #2  
blue_neon
Elite Rep
 
Join Date: Aug 2004
Location: Melbourne - Australia
Posts: 2,096
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Its called 'Rapid Rise'.

Long Cage - wider range of gears
Short Cage - shorter range of gears
I can't remember how to know exactly what is recommeneded, i think there was a 'forumla' or something i read. I"ll try and find it for you!

blue_neon is offline  
Old 05-08-06, 03:07 AM
  #3  
blue_neon
Elite Rep
 
Join Date: Aug 2004
Location: Melbourne - Australia
Posts: 2,096
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Here you may find shiny_car's post of help to you .

Last edited by blue_neon; 05-08-06 at 03:14 AM.
blue_neon is offline  
Old 05-08-06, 12:35 PM
  #4  
Evilbee
Senior Member
 
Join Date: Aug 2005
Location: Birmingham, uk
Posts: 124
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
[QUOTE=Riles]
is one better for shifting that the other or is simply preference ?
QUOTE]

I've been running both for almost a year now, with approximately equal usage, and can honestly say that I don't think that there's really any difference in shifting performance, so for me it would just be preference. There is some kind of shimano press release type thing that I've seen that says which one is better for what, but I can't remember what it said.

Capacities of deraillers is on the shimano website to compare with your cassette to decide long/short cage.
Evilbee is offline  
Old 05-08-06, 01:45 PM
  #5  
gmoneyhobbit
cptn. x-chains sidekick
 
gmoneyhobbit's Avatar
 
Join Date: Dec 2005
Location: san jose, ca
Posts: 455

Bikes: stumpie, xtr, sid, ultimate sd

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
i prefer a med. cage rapid rise rear mech. over others... it just seemsmore natural shifting and the sort
gmoneyhobbit is offline  
Old 05-08-06, 02:02 PM
  #6  
Minesbroken
It is what it is...
 
Minesbroken's Avatar
 
Join Date: Aug 2005
Location: Long Island NY
Posts: 811

Bikes: Trek 6500 w/ stuff

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I was under the impression that long cage deraillers were for bikes with 8 or 9 speed cassettes that have a 3 gear chainring and short cage deraillers are for bikes that either have a narrower cassette or have a 2 gear chainring. alot of street bikes also use short cage I guess because the lower gear on the cassette isnt as big so the chain doesnt need to move as much. I could be wrong but that was my understanding on lc or sc rule of thumb. as far as towards or away I dont think it makes a difference except for the type of shifter you have. one will move it one way and the other the other way.
Minesbroken is offline  
Old 05-08-06, 03:48 PM
  #7  
gmoneyhobbit
cptn. x-chains sidekick
 
gmoneyhobbit's Avatar
 
Join Date: Dec 2005
Location: san jose, ca
Posts: 455

Bikes: stumpie, xtr, sid, ultimate sd

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
the longer cage is just to pick up slack.. so the smaller the granny upfront is the more likely it is you need a long cage.

i use a med. cage because i dont use my granny gear up front, i usually only use the big ring or middle...

nevertheless, longercage is for slack pick up on smaller front rings
gmoneyhobbit is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ClydeTim
Clydesdales/Athenas (200+ lb / 91+ kg)
0
04-11-17 05:13 PM
AtariBaby
Tandem Cycling
5
09-20-11 12:25 PM
tzracer
Great Lakes
0
03-02-08 11:08 AM

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.