Ultra-G -

I have the same bike - it comes stock with 3/32 all round. I recently picked up Sugino 75's with the 1/8 chainring so I switched the chain out but kept the 16T cog. You can run 1/8 chain on 3/32 parts (with noise) but 3/32 chain on 1/8 parts is bad news.

I'm eventually switching the cog out so I can be noise-free and to general keep things in order.