Removing Stronglight BB fixed cup
08-12-20, 05:02 PM
#1
Old bikes, Older guy
Thread Starter
Join Date: Jun 2014
Location: Fiscal Conservative on the Lefty Coast - Oregon
Posts: 841
Bikes: A few modern, Several vintage, All ridden when weather allows.
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 250 Post(s)
Liked 165 Times
in
114 Posts
Removing Stronglight BB fixed cup
Hi folks,
Any suggestions on how to remove the eight sided fixed cup of a Stronglight bottom bracket? Is a special tool needed? All I have is an 18” adjustable wrench. I’ve the bolt/washer trick and can’t get an adequate grip on it.
Sorry, it’s on a 77-78 Peugeot PRN10. French threads?
Thanks & regards,
Van
Any suggestions on how to remove the eight sided fixed cup of a Stronglight bottom bracket? Is a special tool needed? All I have is an 18” adjustable wrench. I’ve the bolt/washer trick and can’t get an adequate grip on it.
Sorry, it’s on a 77-78 Peugeot PRN10. French threads?
Thanks & regards,
Van
__________________
Remember: Real bikes have pedals.
...and never put a yellow tail on a Red, White and Blue kite!
Remember: Real bikes have pedals.
...and never put a yellow tail on a Red, White and Blue kite!
Last edited by Senior Ryder 00; 08-12-20 at 08:10 PM. Reason: Add info
08-12-20, 07:26 PM
#3
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,056
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4195 Post(s)
Liked 3,837 Times
in
2,295 Posts
My Sutherland's manual says that 8 sided Stronglight fixed cups can be any of 4 differing threadings (Eng, Swiss, Frnch and Itl). What are the other markings as in rings? Are you able to ID the adjustable cup's threading standard?
We pulled out a really stuck fixed cup a few days ago with a Kingsbridge cup vice, Bicycle Research made one too but was smaller. Sheldon Brown has a low cost home made version.
The real issue is the thread direction. Andy
We pulled out a really stuck fixed cup a few days ago with a Kingsbridge cup vice, Bicycle Research made one too but was smaller. Sheldon Brown has a low cost home made version.
The real issue is the thread direction. Andy
__________________
AndrewRStewart
AndrewRStewart
08-12-20, 08:52 PM
#4
Friendship is Magic
Join Date: Nov 2010
Location: Sacramento, CA
Posts: 22,984
Bikes: old ones
Mentioned: 304 Post(s)
Tagged: 0 Thread(s)
Quoted: 26382 Post(s)
Liked 10,362 Times
in
7,196 Posts
...just as an addition, this will doubtless be difficult to remove. Are you removing it for replacement with something else ?
Because if you are only servicing the BB, leaving it in place and cleaning it thoroughly is much easier and the way most people handle the re-lubrication of these.
I have bolted something to them in the past, but by far your best bet is someone with one of those fixed cup tools like Hozan sells.
I think there are other manufacturers making and selling similar tools now. They are not cheap, but work well.
You can usually figure out the threading by taking everything else out, cleaning the inside of old grease, and peering in there with a light and a mirror.
Because if you are only servicing the BB, leaving it in place and cleaning it thoroughly is much easier and the way most people handle the re-lubrication of these.
I have bolted something to them in the past, but by far your best bet is someone with one of those fixed cup tools like Hozan sells.
I think there are other manufacturers making and selling similar tools now. They are not cheap, but work well.
You can usually figure out the threading by taking everything else out, cleaning the inside of old grease, and peering in there with a light and a mirror.
08-13-20, 08:09 AM
#5
Old fart
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,777
Bikes: Several, mostly not name brands.
Mentioned: 153 Post(s)
Tagged: 0 Thread(s)
Quoted: 3582 Post(s)
Liked 3,395 Times
in
1,929 Posts
The VAR-30 is the best tool for this, but the Kingsbridge cup vise mentioned above by @Andrew R Stewart or its DIY equivalent per Sheldon Brown also can work.
08-15-20, 04:25 PM
#7
Senior Member
Another option is to take a one of those cheaper cup-wrench/spanners (usually made of not-so-hard steel), in a slightly larger size, and file it down until it matches the Stronglight-specific diameter.
I did this myself years ago, and it worked adequately, although slipping under high load is an issue especially with French-threaded cups which tend to be installed extra-tight.
Ultimately I acquired the VAR-30 tool which makes it a cakewalk every time so long as you guess the thread directly correctly.
I did this myself years ago, and it worked adequately, although slipping under high load is an issue especially with French-threaded cups which tend to be installed extra-tight.
Ultimately I acquired the VAR-30 tool which makes it a cakewalk every time so long as you guess the thread directly correctly.
