I do not have specs on the c-series but the stock wheels are much lighter. I shipped my rims to a guy who screwed me(but i wont get into that) and they where 36lbs. I took off 2lbs for the packing. I think the front rims are 8 lbs and the rear is 9lbs.

 

My new type 6 - C series, weighed 8.1 & 8.3 lbs each, for a total of 32.8 lbs for the set, without center caps & chrome lug nuts... the older type 3's & the new type 5's are both heavier than the type 6's... ( these are kawi weights... weight will vary by bolt pattern, & the size of the center hole )