oh i understand the costs, just playing with the idear. i have some nice rims (mavic 823) that seems to just be too much wheel for me. i am a bit new to biking, and didn't think through the fact (before buying) that with such strong rims, an XC frame and hubs would break first even if the rims could take it. so now i'm thinking about some rims that are a little more congruent with the rest of my ride; somthing a little lighter. since my current rims are nice though, i don't want to trash them.