I am looking to upgrade my 2017 R3 from mechanical to Di2 (10 speed to 11 speed). I am not sure if I need an internal or external battery for the Di2 or not.
Anyone do this kind of an upgrade for their Cervelo I could use some help.
Hi trigator, a lad in the club as an r3 , I’m not sure how old it is, ( it’s
black with a white top tube, if that helps) is battery is installed in seat post, so internal
hope this helps
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