Originally Posted by
Nagrom_
Questionable and hard to prove? Negligible Just compare any manufacturers BB30 crankset with their other systems. Red for example, complete system, crank and BB. BB30 comes to 610g, while GXP weighs 714g. 104 grams are saved. I don't know where you come from, but if 15% is negligible, I wouldn't want to be paying your taxes.
The weight of the bearings is only part of the story, you need to take into account the entire system. There are many variables involved, which is why I'm saying that it's difficult to prove.
Also, regardless of the 15% figure, no one should be worried about 100 grams of weight savings in a bottom bracket. This is a negligible concern. As my coach in high school used to say: if you piss , you lose a pound.
Regardless, BB30 really wasn't designed for recreational cyclists(myself included). The added stiffness, and a substantial weight savings makes it great for pro's, who's bottom bracket bearings are replaced after each race anyway.
We agree then, BB30 is only a good idea if you have a protour mechanic replacing your bearings daily.
A little Loctite 609 and most of everyone's complaints are solved.
Or just buy a frame that uses a threaded BB and your problems are solved.