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 02-15-10, 10:20 PM   #1
MWPdx
Senior Member
Thread Starter
 
Join Date: Feb 2009
Bikes:
Posts: 143
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Front der. won't make it all the way to the big ring... eh?

Am I doing it wrong???

I'm building a bike pretty much completely from "scratch" (got a frame and am slowly accumulating the necessary bits and pieces, most of which are cheap/used).

I got a really cheap looking front derailleur a while ago and I just now got and installed the crankset (TruVative triple somethin' or other). The problem is that the FD won't swing out far enough center over the largest chainring. It looks like it would need to go out maybe a centimeter more or so for it to work.

I know it's not the limit screw (already tried that)... what else could it be?? I did take apart the bottom bracket when I first got the frame and may have put the spindle back in the wrong way but it seemed to be pretty much the same on each end so I wouldn't think that would do it.

I checked on my friends old bike (fairly similar frame, etc) and the large ring sat quite a bit closer to the frame than mine does.

What'm I doing wrong???
MWPdx is offline   Reply With Quote
Old 02-15-10, 10:36 PM   #2
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Is the derailleur for a triple (what is it)? Is the bottom bracket the correct length for the crankset? What shifter are you trying to use with it? Can you get the derailleur to travel to the outermost stop by pulling on the cable? Or is the shifter the problem?

Need. More. Info.
operator is offline   Reply With Quote
Old 02-15-10, 10:42 PM   #3
BCRider
Senior Member
 
BCRider's Avatar
 
Join Date: Mar 2008
Location: The 'Wack, BC, Canada
Bikes: Norco (2), Miyata, Canondale, Soma, Redline
Posts: 5,456
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
A cm is a HUGE amount. Either it is setup to for no more than a road double or your crankset isn't mounted in close enough to the bottom bracket. If you're using a square taper BB then you may have too long a BB axle for this crankset. A way to tell is the clearance of the ring teeth from the chain stay. The teeth of the rings should be REALLY close to the stay. In fact a lot of frames dimple in the chain stay where the inner ring sits to provide clearnace for the ring. If your frame has such a dimple in the stay and the smaller ring isn't sitting into the clearance it provides then chances are your BB is the wrong size.
BCRider 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 03:42 PM.