Re: stuck BB idea

On 2/19/2025 2:25 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. 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.

If you don't care about the cup (and you shouldn't- it's corroded at the thread and they are cheap), I'd saturate the area with rust penetrant (we like GM Rust Penetrant but there are many such products; Kroil, PB Blaster etc) and ride the trainer. The motion will help penetration.  Then yes, external cups are very grab-able with a big pipe wrench.  What's the hose clamp doing? Not much I suspect.
If it doesn't move with moderate torque, saturate again and ride another day then repeat.
You might also shoot some penetrant down the seat tube if it is open to the BB.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971