You have the new Smoke/Dart combo... Kevlar version ?
585g is not so heavy, but you could run other modern tyres like the 2.25 Scwalbe Ron's/Nics Rons are lighter at ~450/475 for the folding/Performance style, Nics are better in the soft mud but heavier at 550/580g (I cannot remember, but they are the tougher SnakeSkin version) The biggest part is they do not feel like heavy tyres as the respond and roll so well in comparison.
Maxxis 310's, shite tyres other than for weighing in, unless you're running down a flat dirt track with no corners and no brambles/hawthorn hedges anywhere. Even worse than Continental Twisters (which are similar weenie tyres)
Anyway, to take that out of the equation just use the tyres on your other bike.
My Kona's crept up in weight, but I don't really notice it.
Good point, I think mine are Smoke and dart 2's and I think they're the old versions so probably heavier.
I thought the 310's may be crap, as light weight tends to mean punctures, and I'd rather sacrifice weight for ride and durability and I am loath to change the Smoke/darts as I love their ride.
Anyway, to be honest it's not just about weight, of course I'd like to shed some weight as the bike is a bit porky, and I want a more convincing balanced front end and hence ride.
I suppose with some lighter forks and a lighter shorter stem i'll have that and will lose weight, about a 24 lbs balanced Hardtail is what i'm after, any farther weight loss is a bonus.
And if I don't get that I'll sell the lot, stick to my MT4 and my new project ( a Reynolds Optima framed M-Trax) as I don't like fat tubes and porky bikes, and these tubes are fatter than I at first thought.