Originally Posted by
FunkyStickman
Going by the link to their website you posted, it's a 34-11 cassette 8-speed. A 34 big cog is huge, much lower than you'd need unless you were hauling 100 pounds of stuff up a steep incline. You could get a standard 11-28 cassette pretty easily, but that only gives you 1 higher gear.
From the pics, it looks like the cranks are 4-arm cranks, which should be 104/64mm set. After you read Sheldon's article on them, measure the bolt pattern and make sure. You can get chainring sets from tons of online retailers, including Amazon. I'd stick with a 28/38/48 set, so you can keep the same front derailer. If you go bigger than a 48 front ring, you may need to change other parts around, and I'm guessing you don't want to spend the money to do that right now.
I thing 48 is all I would need for now without spending too much $ (stock is 42) based on many of you recomendation I think changing/upgrading to a different crank might be smarter long term option. Something like 48/36/26 should be enough for my needs. When I think about it now, it makes more sense if I just destroy the current first in order to maximize my $.
Than going with new crank and casset might be a smarter move.