Chuck Schmidt wrote:
"Split or Bifurcated
One man's double tapered seat stays are another man's biconical"
Touche! Chuck..but I did qualify my description by saying "two-legged split". Something that is split can have more than two legs, sections, portions..so hence in posh parlance I suppose that on this side of the Atlantic we would call a four-legged split rivet a quadrifurcate one..or even a quadrilobate one..or more elaborately a quadrigeminous one.
Norris Lockley..Settle UK