BTW if you can take a photo of the rear cogs it may be apparent if it can take a 10 speed cog. I honestly don't remember where I read this but I remember reading that to use an 8 speed cassette some mfgs were using a spacer. I haven't seen a new 8-speed cassette on a relatively new bike, but to me logistically speaking it doesn't make any sense for a company to make a new wheel+hub that's specifically engineered to only work with a specific cassette only when the same thing can be accomplished with a $.05 spacer.

Then again, corporations have proven me wrong before though.