Hello! I’m rebuilding an old beach cruiser with my son and we ran into this bottom bracket that I have not been able to remove.

The box nut is 34mm wide and recessed making it all but impossible to get a wrench around. I ordered a 34-36mm C hook spanner but that turned out to be too small and prob just not the right tool. Then I ordered a super thin adjustable plumbing wrench that was wide enough but I could not get a good grip due to the nut being recessed.

Now the only thing I can imagine will turn is a 34mm double sided (recessed) wrench which is a huge tool and expensive.

Am I totally backwards on this? I welcome your input! Thank you!