Lightweight BB

Eat less pies?

On a serious note, I doubt that you would notice the difference in weight.
WeightWeenies shows a range of 300g, from 57g to 379g, and bearing in mind a full 500ml water bottle weights 500g, the difference is minor

I think this is a common mistake in the whole weightweenie thing, someone looks at the difference between - for example - crank A and crank B and sees only a 100g difference and concludes it makes zero difference as you can leave your keys at home or take a crap before you leave and save as much weight.

But the point is that when the same level of weight pednadry is applied to the whole bike you end up riding a 13lb bike rather than a 25lb bike.