Thanks for the info guys.

Ordered a 17t and 19t cog to go with my 32t chainring.

Should give me 54.6 inches and 48.8 inches. Have run the 32x20 stock freewheel that it came with for a while. Have 32x18 free on it right now. Was told most people here run 50 gear inches so I think 32x17 fixed will be perfect.