Reinstalled BB, now Fr. deraill. is way off
07-31-17, 03:57 AM
#1
Senior Member
Thread Starter
Reinstalled BB, now Fr. deraill. is way off
I am at my wit's end. I removed my bottom bracket to do some maintenance, like I've done dozens of times (first time on this bike). Replaced it, put on the crank and the derailleur does not go to the highest chain ring (outside). I removed everything checked to see that right was right (the longer side of the axle) and still the same problem.
I didn't touch the derailleur doing this operation.
The derailleur is Deore, the Crank is a Prowheel double and BB is unknown (Sealed, tapered), all on a fat bike. The adjust screw for low is at it's highest, the cable has no slack.
Even on the small ring and on the lowest cog on rear, it is no where near the inside of the fr derailleur cage
Has anyone had this problem?
Any solutions?
I didn't touch the derailleur doing this operation.
The derailleur is Deore, the Crank is a Prowheel double and BB is unknown (Sealed, tapered), all on a fat bike. The adjust screw for low is at it's highest, the cable has no slack.
Even on the small ring and on the lowest cog on rear, it is no where near the inside of the fr derailleur cage
Has anyone had this problem?
Any solutions?
Last edited by MarcusT; 07-31-17 at 04:08 AM. Reason: correction
07-31-17, 05:01 AM
#2
Mike J
Join Date: Nov 2013
Location: Jacksonville Florida
Posts: 1,588
Bikes: 1975 Peugeot PX-50L, 1971 Peugeot PX-10, 1974 Peugeot PX-8
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 392 Post(s)
Likes: 0
Liked 6 Times
in
6 Posts
The bottom bracket shaft is probably reversed. More than likely the shaft has an offset on one side which makes one crank arm sit farther out than the other side. Take it back off and flip it over to the other side.
07-31-17, 06:18 AM
#3
Pokemon Master
How tight did you get the crankarm fixing bolt? 30-50 Nm is the usual spec.
07-31-17, 07:54 AM
#4
Full Member
Join Date: Dec 2014
Location: Retired to Penang Malaysia originally from UK
Posts: 346
Bikes: My 1978 Raleigh from new, 1995 Trek, & constant changing & rebuilding of other bike projects.
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Likes: 0
Liked 3 Times
in
3 Posts
You have obviously not put the sealed BB in wrong way, was there any spacers there before you have missed.
Do I understand you are saying that the crank has not gone on the taper far enough ?
A couple of good photos might help with further suggestions
Do I understand you are saying that the crank has not gone on the taper far enough ?
A couple of good photos might help with further suggestions
07-31-17, 09:30 AM
#5
Senior Member
Thread Starter
07-31-17, 11:11 AM
#6
Senior Member
Join Date: Feb 2017
Location: Northern Shenandoah Valley
Posts: 4,141
Bikes: More bikes than riders
Mentioned: 36 Post(s)
Tagged: 0 Thread(s)
Quoted: 1446 Post(s)
Liked 762 Times
in
570 Posts
I'm not sure how a sealed bottom bracket can be installed backwards. The threads need to match the side of the frame. Are both cups on this sealed unit removable? That's the only way I can imagine a sealed unit going in backwards.
08-01-17, 04:56 AM
#10
Mike J
Join Date: Nov 2013
Location: Jacksonville Florida
Posts: 1,588
Bikes: 1975 Peugeot PX-50L, 1971 Peugeot PX-10, 1974 Peugeot PX-8
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 392 Post(s)
Likes: 0
Liked 6 Times
in
6 Posts
I did the same thing on my PX-10. It shifted fine, but I kept noticing this weird sound like the chain was dragging on the FD. I kept feathering the shifter while riding and staring at it, and I could tell the chain was centered in the cage, so it shouldn't be dragging. Turned out the chain ring was scraping the chainstay. I was positive I'd taken it out and kept it in the right position when re-installing.
Thread
Thread Starter
Forum
Replies
Last Post
dreulandb
Bicycle Mechanics
4
08-12-11 09:54 PM
