Originally Posted by
habilis
I'm the one with the misunderstanding, T! I've muddied the waters with my comments, and I apologize.
It's no problem, Drew used the term spindle I was quoting him... yeah I know your talking about a different setup though perhaps it is similar to the ones I have now but will be removing (but saving for maybe another vintage build later).
Originally Posted by
SkyDog75
In general mechanical terms, a spindle is an axis like a rod around which parts rotate. In this particular case, it's the axle that passes through the frame's bottom bracket shell, around which the crankset rotates. Historically, on road bikes, spindles have typically been separate from the crank arms as a three-piece design: The left and right crank arms each fasten separately to the spindle. Nowadays, it's more common to find two-piece cranksets where the right arm and spindle are a single piece and the left arm gets clamped or bolted to the spindle.
Gotcha thanks for that explanation. I tend to think of it more as an axle since it rotates where a spindle I think of as a stationary device such as what a tire mounts to in the front of a RWD car or truck.
So I've done more reading, and perusing cranksets and have read a few times now while looking up FSA MegaExo cranksets that they are compatible with Shimano HollowTech II is that right? I guess looking at the specs they are both 24mm shafts (spindle?). Could something like the current Dura-Ace 9000 or Ultegra 6800 Bottom Brackets I mentioned previously work both for my older DA7800 crankset and an FSA MegaExo crankset? That would sure make things easier than multiple ones, and I could order an extra spare that would cover both.
Edit: well I knew it wouldn't be that easy. Upon further investigation it seems FSA specs are all over the place with slight differences in BB compatability across their lines, some being Shimano compatible and some not. Why does this have to be so hard lol.