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

Thread Tools Search this Thread
Old 06-04-10, 08:13 AM   #1
Junior Member
Thread Starter
Join Date: Sep 2009
Posts: 19
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Bottom Bracket, bolts and tool question

Hello everyone,

I thinking about replacing my cup and cone bottom bracket with a cartridge unit. I replaced my crankset this season with a shimano M151 set which is square taper. It looks as if the shimano UN54 bottom bracket will work nicely in this application. The present installation has a spindle which uses a nut to attach the crank, not a bolt, so I will need to purchase the bolts as well. After looking over the different types of bolts available I'm not sure which ones I need so I'm looking for some advice in this area. Also I'm wondering if my present crank extractor tool will work ok with the new bottom bracket, it is a "Lifu Cotterless Crank Extractor". What will the center of the tool push against if it is a female end on the bottom bracket?

charles1324 is offline   Reply With Quote
Old 06-04-10, 08:55 AM   #2
Senior Member
Join Date: Apr 2009
Location: 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
Posts: 35,425
Mentioned: 105 Post(s)
Tagged: 1 Thread(s)
Quoted: 3767 Post(s)
The bolts are highly standardized and often come with the bottom brackets. You can buy either the newer cap screw (allen) style for use with a hex key, or the more traditional 14mm bolt which uses the tool you already own.

Before buying, check if they're included with the bottom bracket and if not you can pick up a pair anywhere. BTW- if you can't find them cheap, I have a bunch of the 14mm type and can sell you a pair for $4.50 including postage.
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“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.
FBinNY is offline   Reply With Quote
Old 06-04-10, 11:14 AM   #3
Senior Member
Yellowbeard's Avatar
Join Date: Mar 2009
Location: Nova Scotia
Posts: 851
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Generally speaking, the crank tool works for both types.
Yellowbeard is offline   Reply With Quote

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 07:03 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    get answers from real people!
Click to start entering your question.