I want to do some upgrading on my bike
http://www.specialized.com/us/en/bik...rdrock26#specs
this is what i have at the moment

I already changed handle bars, pedals, tires and seat post to make my bike lighter

I have finally saved up to buy some new wheels, i dont mind if its just one wheel or both,
But im looking for compatible wheels, since my cassette is a freewheel will it be harder to find light weight wheels? I dont know if they affect each other
Can anyone help me find light weight wheels that will fit on to my bike

I am an amateur on bikes, sorry if i didnt make any sense but if you could help i would be gratefull,
Ive been looking around for a while and i cant seem to find anything

The problem i have is that all the wheels i find are disk break only which makes it so much more difficult to find