I've got a Motobecane Ti Fly 29er. Just upgraded the wheels to Ibis 928's.
Main reason for the wheel upgrade was to go tubeless, but was also hoping to shed some weight.
I'm amazed at the weight savings.
Bike came with Veulta Pro wheels, and WTB Prowler tires, with tubes.
New setup is Ibis 928's with Racing Ralphs snakeskin TL. Also upgraded from a 12- 36 SRAM 1070 cassette to an 11-36 1090.
The total weight savings, as measured on my scale is 1457 grams; more than 3 pounds.
still need the 10/135 axle ends for the wheels (supposed to come today) before I get to ride them. Can't wait.