Changing di2 rear derailleur

[Jason.T]

Hi guys

A mate of mine has ultegra di2 with a 11-28 cassette, he wants to change the cassette to 32t he has a short cage derailleur so will need to go medium or long

Can the rear derailleur just be swapped out or will it need pairing in some way or even plugged into the laptop, I'm hoping it's just a straight swap

Many thanks in advance

 

[steveindenmark]

Mine was just a straight swap. Nothing else was changed.

 

[Jason.T]

Mine was just a straight swap. Nothing else was changed.

Thanks for the reply, I presume if it's the same model number it should be fine

 

[Jerry Atrik]

Straight swap also . Put another two links on the chain but not sure if I needed to !