@Marten:
In de categorie fietshumor heeft Sheldon ook zijn (1 april-) steentjes bijgedragen met onder andere 'Superleggero' holle (!) fietskogels
Waarop iemand hem daarop antwoordde:
"I hope you realise this is now obsolete technology. The really hot balls are the titanium vacuum sputtered bearing balls with graphite cores. Self lubricating too. And only $49.95 for the 1/4 inch with 0.002" wall size. For the really serious riders they extract the graphite through sub micron hole electro machined holes to cut the weight by another 0.62422 grams. But these do require lubrication.
While I've had some success with aluminum cables I really think that braided silk cables offer much more in the way of aesthetic appeal if you're willing to accept a little more *stretch*."
https://www.sheldonbrown.com/bicycleHumor.html
Dirk