haibike sduro trekking 6.0 2019 Chain

Bobajob

Esteemed Pedelecer
Nov 1, 2019
313
140
Cornwall
I'm looking to accumulate some spares for my newly acquired bike.
I've sorted some bur not quite sure how to find out what chain I need.
I have seen on another forum that possibly it could be a KMC x10e but not sure of how many links i'll need.
Ebay have advertised 116, 122l and 136 links.
Price ranges for the same chain range from £18-35
Any views other than counting my present chain?

thanks

bob