Bottom bracket question
#1
Thread Starter
Full Member
Joined: Jun 2018
Posts: 210
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Bottom bracket question
Can someone suggest which tool i need to disassemble this crank and remove the bottom bracket?
I've done almost complete refurbs of bikes before with everything except the crank/BB. Gonna tackle that this time, just never worked with one before. Thanks!
I've done almost complete refurbs of bikes before with everything except the crank/BB. Gonna tackle that this time, just never worked with one before. Thanks!
#2
I’ll guess the crank interface is a square taper.
see this: https://www.parktool.com/blog/repair...on-three-piece
Once you remove the crank, it’ll reveal what is needed to remove the bottom bracket.
see this: https://www.parktool.com/blog/repair...on-three-piece
Once you remove the crank, it’ll reveal what is needed to remove the bottom bracket.
#3
Really Old Senior Member


Joined: Feb 2007
Posts: 14,610
Likes: 1,861
From: Mid Willamette Valley, Orygun
Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds. 2019 Giant Explore E+3
You'll need a 14mm socket and a long lever to break loose the bolt.
Post a pic of the NDS and we may have a better idea of which BB you have.
Post a pic of the NDS and we may have a better idea of which BB you have.
#4
Old fart



Joined: Nov 2004
Posts: 26,316
Likes: 5,226
From: Appleton WI
Bikes: Several, mostly not name brands.
Yes, a 14mm socket to remove the nut from the axle, as [MENTION=78399]Bill Kapaun[/MENTION] suggests. After that, a 22mm crank extractor to remove the arms from the axle. What you'll need after that isn't entirely clear from your picture. It's hard to tell, but the drive-side ("fixed") cup looks like it may be octagonal, rather than just two flats for a tool. That means you could be dealing with a French bottom bracket, which could have a non-standard thread.
Get the arms off the axle and post pictures of both sides of the bottom bracket.
Get the arms off the axle and post pictures of both sides of the bottom bracket.
#5
Senior Member

Joined: Feb 2012
Posts: 3,027
Likes: 1,062
From: Golden, CO and Tucson, AZ
Bikes: 2012 Specialized Elite Disc, 1983 Trek 520
Judging from what looks like corrosion on the BB cup in the photo, this one could be a struggle. You might want to start applying penetrating oil now.
#6
Thread Starter
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Joined: Jun 2018
Posts: 210
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So this an 80s Peugeot Orient Express. From what I've read they were built with standard threading unlike most of the french designed bikes.
There is corrosion but so far all the other parts have come off fairly easily. Crank/BB is the only thing left on the bike, took me about an hour to strip it all down. I'll take a pic of the NDS today.
Thanks all
There is corrosion but so far all the other parts have come off fairly easily. Crank/BB is the only thing left on the bike, took me about an hour to strip it all down. I'll take a pic of the NDS today.
Thanks all




