I considering SS'ing my handjob and just wondering what size rear cog to put on.

I'm going to be running a 32t front ring, so it's either 16 or 18 out back.

The bike will be used for riding place like Delamere and the local woods/, nothing major, just thought I'd give it ago

I use 18 but i ride in the Lakes, i would say start with 18 if its your first time SS and see how you go, can always stick a 16 on later.

I run a 32:16, but live on the edge of sherwood pines, so not exactly the most difficult of terrain.
32:18 should be good, but you'll obviously spin out even sooner decending.

Not bothered about the spinning out bit, just wanna get up hills 😆

I've been riding SS on the road for about 6 months now though.

There's hills in delamere?

Steve 32:18 is fine for Delamere as its short sharp stuff so the ability to accelerate quickly is best.

Yeah at least one!!