She weighs about 29 lbs with the Pike and Joplin. I'm guessing she'd be around 26-27 lbs with my Masterpiece and Reba back on there. As for the tires I've only ridden them during the summer, and they will not be on when it becomes muddy.
You will be the first person I think of if I ever get rid of this frame, but don't hold your breath. I made the mistake of selling my last Blur 4X frame and I doubt I'll make it again.
I'll assume you meant to type "4X." Well, sir, a 4X is nice for me for trail riding because it's light like a Blur XC but has geometry more like an FR bike, which suits me nicely. As it stands right now (since I put my Reba back on) it weighs just over 28 lbs.