Those would be al. shafts, wouldn't they?

Well Idon't them all, or rather many of them butthe ones I'm familiar with, the stiffer the heavier.
Glad you old guys chimed in.
LOL, then check out some of the larger thin walled carbon shafts out there, compare them to thicker walled smaller diameter shafts, compare weight and spine, and the same will hold true - guaranteed.
Old Huh, let's just say wiser.