My understanding was that the cutouts were to let out the water that would get into the frame during rainy rides. I've taken out my seatpost immediately after riding in heavy rain it appeared that water was getting inside, I suppose between the seatpost and seattube.
-Eric
Eric Goforth Durham, NC USA
Waldo Magnuson wrote:
> Hi Chuck,
> My guess is the cutouts were only to save weight. I have a 1973
> Italvega SuperSpeciale which has no BB cutouts and the 1974 Italvega
> SuperLight did have cutouts. Both were top of the line for their year.
> Usually there was a plastic liner inside but I agree with you why open
> up the frame and bearings to moisture and dirt to save a few ounces.
> Skip Magnuson
> Spokane, WA USA