Thank you Benz, that clarifies things.
It’s an academic question as I don’t have a bike with a 73mm shell.
I own plenty of parts to keep a few bikes on the road for the foreseeable
future.
I can’t really justify adding a new standard with plenty of good stuff on
hand.
Cheers,
Ray
On Sunday,
You shouldn't change the spindle length because the spindle length is
primarily used to determine chainline.
What you should do is to look for a BB spindle length 122mm, but with a
2.5mm offset*. Then you can use a lipless mounting ring to secure the
shorter cartridge BB in the wider BB shell.