I'd like to lighten up my wife's bike a bit (so she'll keep up better ) and was looking for some input and suggestions for a wheelset for her. She rides a hardtail K2 Zed 3.0 (V-Brakes) that is currently stock. The bike weighs 29 lbs and I just know that the wheels and hubs are crap heavy. My wife's riding weight would be around 110-115 pounds and she only rides XC- not too aggressive but rocks and hardpack bumps are not out of the question. I'd like to pick up a nice used set (ebay or whatever) for her to try out. If anyone can give me some suggestions I'd appreciate it.