My head is spinning with confusion on BB terminology, I'm hoping somebody can clarify things.
I'm interested in building a road bike with the Dengfu FM098 frame and an Ultegra groupset that I would like to purchase from Chain Reaction Cycles.
The frame is here:
And from Chain Reaction the Ultegra groupset can be purchased here with some options:
or here with pretty much every conceivable option:
So here is where the confusion begins. The Dengfu link above lists the FM098 Bottom Bracket as "BB: English BB/BB30", I'm under the impression that this means a choice of an "English BB" or a "BB30" bottom bracket, is this correct?
Now considering the Chain Reaction Ultegra Groupset links, the one with fewer options does not list an option for BB, rather it states "Incl. Hollowtech II Bottom Bracket SM-BBR60 BSA". The Ultegra Groupset builder with the many options has 2 choices for BB after choosing the Shimano Ultegra 6800 Bottom Bracket option, "English 68mm" or "Italian 70mm"
So I checked the Wikipedia page for BBs:
The table towards the bottom (see the column heading "Bottom Bracket Thread Name") seems to imply that ISO/English & BSC (British Standard Cycle) and BSA all effectively mean the same thing, and that the shell with for these is 68mm.
At this point I'm under the impression that the Denfgu "BB: English BB/BB30" means a choice of an English Bottom Bracket or a BB30 Bottom Bracket. I'm also under the impression that the Chain Reaction Cycles Ultegra Groupset with "Incl. Hollowtech II Bottom Bracket SM-BBR60 BSA" would match the Dengfu frame with the English BB option, since BSA seems to mean the same thing as English, and English seems to be 68mm, is this correct?
If not, would the Chain Reaction Ultegra Groupset Builder with the "English 68mm" option fit the Dengfu FM098 frame with the "English BB" option (supposing this is actually a separate option from the "BB30" on the Dengfu FM098)?
Sorry if this is a beginner question but BB terminology can be quite confusing!