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 02-14-08, 02:55 AM   #1
jmntn2000
Junior Member
Thread Starter
 
Join Date: Jul 2007
Bikes:
Posts: 24
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
SRAM rival fd

I just installed a new rival groupset and everything is shifting good without chain rub etc., but the FD when shifting from the big ring (position 3 of 3) to the small ring jumps all the way back to position 1 skipping the little ring trim position 2? Is this normal, it is as if the tension is too high, but if I back the tension off at all then i get chain rub. I think everything else is adjusted properly and it up shifts (going from position 1 to 3) properly with the trim on small ring. Is this normal for sram?
jmntn2000 is offline   Reply With Quote
Old 02-14-08, 10:07 AM   #2
mtnbiker4791
Senior Member
 
Join Date: Dec 2006
Location: Aurora,CO
Bikes:
Posts: 298
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Only sram red shifters have a trim adjustment in the shifter, Rival has just 2 positions. It does feel like it has a trim but it doesnt
mtnbiker4791 is offline   Reply With Quote
Old 02-14-08, 10:12 AM   #3
Zouf
Senior Member
 
Join Date: Aug 2004
Bikes:
Posts: 736
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by jmntn2000 View Post
I just installed a new rival groupset and everything is shifting good without chain rub etc., but the FD when shifting from the big ring (position 3 of 3) to the small ring jumps all the way back to position 1 skipping the little ring trim position 2? Is this normal, it is as if the tension is too high, but if I back the tension off at all then i get chain rub. I think everything else is adjusted properly and it up shifts (going from position 1 to 3) properly with the trim on small ring. Is this normal for sram?
All FD brifters with trim I've seen do this (Sora, Ultegra). There are actually 4 positions, not 3: low, low+trim, high-trim, high. Going from low, first click gives low+trim, second gives high. Going from high, first click gives high-trim, second gives low. You can't land on high-trim going up, and you can't land on low+trim going down.
Zouf is offline   Reply With Quote
Old 02-14-08, 10:30 AM   #4
markjenn
Senior Member
 
Join Date: Aug 2006
Bikes:
Posts: 892
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Sounds normal to me. AFAIK with SRAM Rival/Force, a partial shift from small ring gets you the small trimmed position (for the last couple small cogs). A full shift from the small ring gets you the big ring (which has no trim for all cogs). Any shift off the big ring moves the cage full left back to the untrimmed position on the small ring.

- Mark
markjenn is offline   Reply With Quote
Old 02-14-08, 10:36 AM   #5
markjenn
Senior Member
 
Join Date: Aug 2006
Bikes:
Posts: 892
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Quote:
Originally Posted by mtnbiker4791 View Post
It does feel like it has a trim but it doesnt
Don't think this is correct. From my SRAM Rival/Force Brifter manual:

The left shifter offers a trim position for the front derailleur to allow the chain running smootly in the small chainring in extreme positions. (Shift position 1 and 2 is for the small chainring. Shift position 3 is for the large chainring.)

I believe Red provides for trimming on the big chainring in addition, at least that's what I've heard.

- Mark
markjenn is offline   Reply With Quote
Old 02-14-08, 11:02 AM   #6
jmntn2000
Junior Member
Thread Starter
 
Join Date: Jul 2007
Bikes:
Posts: 24
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
ok, so it is not suppose to land on the trim position 2 coming from position 3. That makes sense and in viewing the SRAM video on their site under service it looks like their FD moves from position 3 to position 1 as well. Thanks everyone.
jmntn2000 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 02:35 AM.