Looking to build a fixie mountain bike for the winter rides. Anyone know where I can get a wheelset? looking to put some nasty studded tires to cope with the cleveland roads.

get a disc wheelset and a bolt on cog like a tomicog

You can get some from bikeisland.com that have a flip flop hub.

This wheel set isn`t too bad. Decent rims and the hubs are okay, just make sure the cog is TIGHT, as there isn`t a ton of threading for the lockring. I`m not too sure that the hub wouldn`t strip under a really hard skid. Abit heavy but for $115 a good deal, if there are any in stock. Nice customer service as well at bikeisland.com.

As an aside if you are looking for a frame, the Motobecane Outcast is great at $120. Been riding mine for a month with the wheelset and it's been awesome.