My 2005 Blur ( not the XC, but original), size large, weighs just under 25 pounds. I have an F100RLT fork, RP23 rear shock. Kenda Small Block 8s (2.3 front, 2.1 rear) running Stan’s Tubeless. WTB laserlight hubs, DT revolution spokes and Velocity rims. Syncros Ti post and aluminum stem. Monkeylight bars. XTR crank, cassette and front derailleur and SRAM XO components for the rest. I used to be a weight weenie. It’s great to have a light bike ( my SS Yeti Arc 69eris about 21 pounds) , but I’ve since ridden 26-28 pound bikes and am not convinced it really matters that much. You should be able to pull off a pound easily and a couple with some $$. I think Stans is the way to go – they save a bunch of weight over slimed tubes and they hold up just fine if you watch air pressure. I have had two failures in the 6 or so years I’ve used them – one from not airing up adequately and one from an experiment on a non-compatible 29er rim.