Originally Posted by
HillRider
Some were and some weren't. Shimano's Octalink was a questionable improvement in weight and stiffness but at least their bottom brackets were durable and reliable. ISIS varied all over the map in terms of quality. Some were dreadful and some were pretty good.
The newest external cup bottom brackets have some theoretical benefits but how much they really change things for the better is highly debatable.
Increasing the rod into a tube and decreasing the leverage on that tube are damn fine ways to go about getting the same job done with less metal.
The principle is definitely sound; I just hope the industry can settle on a well-sorted, hassle-free standard.
Is there a particular means of securing crankarms associated with BB30, or does it just relate to the bearings and spindle?