On Wed, 25 Apr 2018 08:54:51 -0000 (UTC), Tanguy Ortolo
wrote:

One other thing, I have seen suggestions of lubricating only the chain,
and not the sprockets and derailleur. However, I think the derailleur
sprockets still need some lubrication to roll with few friction, do they
not?

If you lube the chain (with whatever) some of that lube will be
transferred to the sprockets. For proof simply handle a newly lubed
chain :-)


--
Cheers,

John B.