Originally Posted by
rpenmanparker
The question is why not have both threaded shell and oversize crank. The FSA BB386 standard has aluminum, 30 mm diameter, 86.5 mm long spindle and is compatible with several BB types including oversize, outboard cups that thread into the BSA shell. I am not sure how the ball bearing size in BB386 compares with that in Hollowtech II. Perhaps you could shed some light on that. In any case Shimano could offer cranks that would be supported by that standard without significant depature from its current principals.
You have have that correct Shimano could simple to to a 30mm spindle and have threaded shells but manufacturers realize it is much cheaper and easier to make a BB that is simply a shell. They tell you it saves weight but that is crazy, it is all about money and saving cost. Just for comparison I repair guitars and play them and work with fine handmade jazz guitars. The makers stopped using binding around the body and f holes, no inlay, they tell you it looks more elegant and natural. Garbage.............they are trying to save work and money. It is fine to change the looks of something but be honest the intent at the start is to make guitars easier and cheaper to build.