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From: Frank Krygowski <frkrygow@sbcglobal.net>
Newsgroups: rec.bicycles.tech
Subject: Re: stuck BB idea
Date: Wed, 19 Feb 2025 20:51:13 -0500
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On 2/19/2025 6:39 PM, AMuzi wrote:
> On 2/19/2025 5:25 PM, Mark J cleary wrote:
>> On 2/19/2025 4:20 PM, Zen Cycle wrote:
>>> On 2/19/2025 5:17 PM, AMuzi wrote:
>>>> On 2/19/2025 3:45 PM, Zen Cycle wrote:
>>>>> On 2/19/2025 3:25 PM, Mark J cleary wrote:
>>>>>> I have this FSA BB that is stuck on the drive side cup. That would 
>>>>>> be a reverse threaded external BB.
>>>>>
>>>>> Sorry if this is a dumb question, but you're sure it's reverse 
>>>>> threaded?
>>>>>
>>>>>
>>>>>   It has been on the indoor trainer and
>>>>>> actually works but I want to get a new R7000 crankset.
>>>>>>
>>>>>> I have tried the usual BB tool but it will not budge and I chewed 
>>>>>> the outside of the notches trying. So now my thought is get a hose 
>>>>>> clamp and put it around the BB cup. Then get it really tight. Then 
>>>>>> take a large pipe wrench and set it up to grab the clamp threading 
>>>>>> as a point of pressure and give it the big turn.
>>>>>>
>>>>>> What do you thing of this idea. I don't try getting some 
>>>>>> penetrating oil in around too much work. I just want to give this 
>>>>>> one big swipe with the pipe wrench. If the frame goes south 
>>>>>> doesn't matter.
>>>>>
>>>>>
>>>>
>>>> Good point.
>>>> The Habaneros are all BSC.  The early Italian built LeMond maybe not 
>>>> but Lemonds that I've worked on were BSC.
>>>>
>>>> Outboard cups are generally well marked. OP ought to double check that.
>>>>
>>>
>>> And the newer ones usually have an arrow marked on them somewhere.
>>>
>> No a modern BSA threaded BB and FSA BB bracket with external bearings. 
>> It is reverse threaded. I tried my 8 inch pipe wrench but it would not 
>> grip real good and slipping. I think I need and bigger pipe wrench. I 
>> could cut it out but how is the is the next thought? Pull the crank 
>> and put a hacksaw in the BB. I would need to take blade and run it 
>> through the BB and attach and then saw?
> 
> Eight inch wrench?
> If you cannot borrow a regular 30" wrench, slip a tube over the end of it.
Absolutely!

In my heavy portable tool box, I have two pieces of square steel tubing: 
one is 1.25" square, the other 1" square, nested inside the first so 
they don't take too much space. When I need lots of torque, I slide one 
over a wrench handle, then the other for a longer lever. If necessary, I 
can slide something else into the end of the last tube.

I don't know if this would apply to Mark's setup, but Sheldon Brown's 
site has an interesting way of removing old style bottom bracket cups 
that are stuck. See https://www.sheldonbrown.com/tooltips/bbcups.html


-- 
- Frank Krygowski