As eippo1 said, that's a very nice set of wheels built for a relatively light person. I'm on the same rims with 28 spokes front and rear, and at 180 lb had no problems. I personally wouldn't recommend 20 spokes up front on those rims for anyone over 140 lb, mainly from a spoke tension standpoint. If you like climbing, this super light set should gain you 2 mph in placebo effect alone.