I use a pair of Mavic Open Sport on my wheels for tires up to 32mm (mfr rated 19-32, 20.2 width). They weigh in at 490g. $49.95 at Harris Cyclery. Velocity Dyads are on my other wheels for tires greater than 32mm (mfr rated 28-60, 24 width). Mfr says 525g, Harris and Peter White say 480g. Above weights are for the 700c sizes.