Broke the rear wheel and bent the front factory wheels on my Specialized Expert 29er (carbon frame hardtail). I knew the rims (24mm) were sketchy for off road use at my weight (250), but I only ride the bike on the pavement, so I thought they'd work great - nope. Anyway, I had Jude at Sugar Wheelworks in Portland build me up a set on Velocity Blunt rims (28mm). Red isnt my favorite color, but she gave me a deal on them. The 700x35 slicks fit great and the ride quality is much better. Anyway, if you're in the Portland area, check out Sugar Wheelworks - she's build two sets for me and they've been bombproof so far.