I installed a set of new (NOS) Dura-Ace SL-7700 downtube shifters in early April, and they have been great so far after 2400 km.
Now, I'm thinking about upgrading all of the components on my 30-year-old Bianchi, from the original 105 to Dura-Ace 7700.
I would be making the upgrades piecemeal, as my budget allows and as I'm able to find NOS or used components in good condition.
So, that means I would have a mixture of 105 and Dura-Ace for a while, until I'm able to complete the entire set.
Would a Dura-Ace (10s) rear hub be compatible with my 105 (8s) rear derailluer?
I use downtube shifters set to friction mode, so I shouldn't have to worry about shifting inconsistencies other than adjusting the limit screws, correct?
Maybe I'll need a new chain?
Are there any other issues I should be aware of?