Originally Posted by
Steve B.
An "upgrade" kit is different then a soup to nuts. Is the 6870 mechanical ?, I thought that was the Di2, could be wrong.
If you have 11 spd Shimano current, even 105 (5800), the 8050 upgrade is about $1,000. $900 if you don't do a WiFi unit and extra cable for that. I just did this with a 5800 crank, b-bracket and brakes. I also had a new'ish cassette but put a new chain on. the 6870 Di2 upgrades are maybe $100 cheaper.
Yes, upgrade kit. Was $700 from UK with a GS about a year ago. Added a SS mechanical and the ANT+/BT for under $100 and swapped the cages. 5800 or even 6800 brakes can be found on eBay for under $100 easy.
Point being, It can be done for way less than $1600.