What size did you end up going for?
ZS55 from Gusset?
I have the same issue with same bike 🙂 I also wonder about changing it. Do I need anything special to pull the current cup and press the new one? I’ve only changed integrated headsets before.
I guess a rack may work with a seatpost adaptor http://www.tredz.co.uk/.M-Part-Seat-Clamp-Mount_34111.htm?sku=79197
Does it have proper rack mounts and how is the tyre clearance? Could it take much larger tyres?
Also, what about the pink decals? Can they be removed easily?