MyM3Coupe wrote:tommasini wrote:Good point as for the most part bb30 is an ok idea that caused more problems than solutions. Thus on the way out
Installed correctly, BB30 is fine 99% of the time, and builds up a light frame. It's only "going out" as it's expensive as hell to install it correctly (wicked tolerances). It's not good for mass produced frames. I have two Time frames with thousands of miles with BB30 and the cranks spin beautifully.
On the topic SCAM is light as it's crap. Several people in out riding groups have had issues with it. It's either Shimano or Campagnolo for long lasting components.
BB30, while never really been fully adopted as Cannondale would have hoped, has other issues than strictly being "expensive as hell to install correctly". That part, sadly, has stuck with us in the form of all kinds of press fit proliferations, regardless of whether BB30 is employed or not. But something that rarely gets touched on is that one of the main reasons for BB30 in the first place was to be able to use a larger diameter spindle made of aluminum alloy and have the whole thing be stiff and light. Trouble is, aluminum alloy is arguably just not a very good material for that application. It expands and contracts with temperature changes quite readily, far more readily than steel. I'm sure you're aware of people freezing their aluminum spindles to get them installed through the bearings. And those bearing tolerances need to be adhered to, so it was a perfect storm of imperfect installations in imperfectly round shells and surfaces rubbing on each other to create that incessant creak creak creak that has become so prevalent in today's bike world. It's nice that frame manufacturers have larger bb shells to center their frame designs around, but maybe the steel ~24mm spindle is still simply the strongest, most reliable and trouble free form to attach a couple of crank arms to and still be able to have room for good size reliable bearings under all circumstances.