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From: Zen Cycle <funkmaster@hotmail.com>
Newsgroups: rec.bicycles.tech
Subject: Re: Stuck BB
Date: Mon, 16 Sep 2024 15:00:23 -0400
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On 9/16/2024 1:57 PM, Mark J cleary wrote:
> My Wilier has a stuck right cup BB. At the moment the cranks spin fine. 
> It has an FSA Mega Exp crankset that is the one that is not pinch bolts 
> but uses self extracting allen key to put on drive side crank arm. Has 
> the wavy washer in the set up. I think that is why the bearings went bad 
> because it allows moisture to get in not sealed like a regular shimano 
> crank and external BB.
> 
> The BB is of course and external BB from FSA. The let side cup bearings 
> went bad so I used a Shimano BB60  cup because I had a spare one. The 
> crankset works beautiful now. However I would like to simply try and use 
> the whole Shimano BB60 bracket. I cannot however get the right side cup 
> off. I realize it is left hand threaded but it is really stuck. I tried 
> putting in a vice and using the bike to turn but no luck.

I was going to suggest that.


> I have managed 
> to chew the notches pretty good but it will take the wrench at this point.
> 
> Any suggestions on how to get the cup free. I actually think it would be 
> easier to simply hacksaw the cup and take it out but I don't want to 
> mess up the treads in BB of the bike. I will take any and all 
> suggestions on how to get this cup off. At the moment the cranks spin 
> fine because the bearings are fine on the right side cup but I just 
> don't like the set up. I may even go to a shimano R7000 crankset. ]


I'm sure Andrew may have some sage advice, but if you're beginning to 
see damage to the cup, I'd suggest taking it to a shop.

If you still want to DIY, get one of these to match your threading first.

https://www.amazon.com/HOZAN-C-402-Bottom-Bracket-Tap/dp/B000BSBSLQ/

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