Bottom bracket too short ?
03-10-11 | 09:37 PM
#1
Thread Starter
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Joined: Mar 2011
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Bottom bracket too short ?
Hi,
Recently my lockring on my bottom bracket got unscrewed by itself and I can't put it back on because the bottom bracket is too short ! ( See picture below ). I don't know the brand of the bottom bracket but it's old and rusty, (I'll chaqngeit soon) and the lockring is quite new. I ride a fixed gear if it helps.
https://img708.imageshack.us/i/img0199ui.jpg
https://img197.imageshack.us/i/img0200qp.jpg/
So here it is I hope I can get some help ! Thanks !
Recently my lockring on my bottom bracket got unscrewed by itself and I can't put it back on because the bottom bracket is too short ! ( See picture below ). I don't know the brand of the bottom bracket but it's old and rusty, (I'll chaqngeit soon) and the lockring is quite new. I ride a fixed gear if it helps.
https://img708.imageshack.us/i/img0199ui.jpg
https://img197.imageshack.us/i/img0200qp.jpg/
So here it is I hope I can get some help ! Thanks !
Last edited by zakiuz; 03-10-11 at 09:39 PM. Reason: pics
03-10-11 | 11:58 PM
#2
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Joined: Dec 2010
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From: Beaverton, Oregon
Bikes: too many
Go to these websites, sheldonbrown.com/harris/bottombrackets.html#shimano and https://sheldonbrown.com/bbsize.html. It looks like the bearings (balls) are gone.
03-11-11 | 02:10 AM
#4
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From: Flagler Palm Coast, FL
Bikes: 1986 Fuji Allegro 12 Spd; 2015 Bianchi Kuma 27.2 24 Spd; 1997 Fuji MX-200 21 Spd; 2010 Vilano SS/FG 46/16
How much is on the other side ? It might be a matter of centering it up ? Anyway, if you're going to replace it, just get a sealed bb system threaded in there ?
03-11-11 | 12:27 PM
#5
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From: Shady Pines Retirement Fort Wayne, In
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who put the bearings in? I agree it looks like your fixed cup may be loose too. take the bike to whoever did the work.
I agree too that perhaps a cartridge style BB my prevent further problems
I agree too that perhaps a cartridge style BB my prevent further problems
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
Last edited by Bianchigirll; 03-11-11 at 12:36 PM.
03-11-11 | 02:53 PM
#6
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Ok thanks guys ! I'll change this then, but I'm a bit short on money would this make it ?
https://www.google.com/products/catal...=0CI8BEPMCMAU#
I never used recent bb, do I have to get the bearings or they come with it ? Thanks again !
https://www.google.com/products/catal...=0CI8BEPMCMAU#
I never used recent bb, do I have to get the bearings or they come with it ? Thanks again !
03-13-11 | 01:55 AM
#7
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From: Flagler Palm Coast, FL
Bikes: 1986 Fuji Allegro 12 Spd; 2015 Bianchi Kuma 27.2 24 Spd; 1997 Fuji MX-200 21 Spd; 2010 Vilano SS/FG 46/16
I'd take it to the LBS if you are uncertain about fit and proper installation, they have the special tool that torques it into the bb tube properly. It's a sealed system, and the ball bearings are inside it already.
03-13-11 | 11:18 AM
#8
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From: Shady Pines Retirement Fort Wayne, In
Bikes: Too many to list here check my signature.
I agree!! if you are unsure what you are doing have a shop do it. you could also ask if a BFer close by would be interested in helping you out.
__________________
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
03-13-11 | 11:54 AM
#9
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
The others are right, the right cup backed off and you took up the slack on the left. It's easy to fix and you can do it yourself if you have a crank remover and the correct wrench for the right. It looks like a 3-notch cup so you might do the job with the crank on turning the cup with a hammer and punch. This seems like a crude technique but was standard practice when this BB was made.
The key is to remember that the right cup is always set tight to the frame, and the bearing adjustment is done from the left. DSo before you start back out the left cup so the spindle is sloppy before you bring the right in. If turning the right eliminates play, back off the left more and continue so you're tightening the right without tightening the bearings. When the right side is home, you can finish the job using the adjustable cup and lockring.
The key is to remember that the right cup is always set tight to the frame, and the bearing adjustment is done from the left. DSo before you start back out the left cup so the spindle is sloppy before you bring the right in. If turning the right eliminates play, back off the left more and continue so you're tightening the right without tightening the bearings. When the right side is home, you can finish the job using the adjustable cup and lockring.
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An ounce of diagnosis is worth a pound of cure.
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
