I'm slow on a light singlespeed, slower on a bouncy bike with gears. What I don't understand is the practise of cutting down bars, running three disc bolts and such. That to me is pointless, but again, each to their own.
That blokes a unit in the photo at 170lbs, he must have been square at 205lbs.....
There was a phase in the DH scene to get bikes as light as possible... somebody got their Trek Session coke can to 27lbs or something?
Quickly found it was just too twitchy bouncing off everything, so the weight went back on again.
Around 36-38lb seems to be the average sweet spot.
Found the link.... http://www.ridemonkey.com/forums/f19/29-76-lbs-trek-session-88-a-230348/
I ride and race mine at around 9kgs and love it. I can just about get it under 9 with silly tyres and saddle. Howver I find it's the tyres that make the most difference, I tend to train on 2.25 and race on 2.1s and it's a world apart.
how high is your tyre pressure? Going lower will make a difference i reckon, though I've never ridden a bike that light. But with the nobby nics they can feel skittish if the pressure is too high, I now that much.
i don't like light wheels, obviously i don't like heavy wheels either.light wheels = nervous handling
heavy wheels = hard work
somewhere in the middle is nice...
My 'heavy' wheels are what plenty of people call light (Pro 2s on Crests at 1585g), I find them heavy, slow and generally unpleasant! It's what you're used to and that 
how high is your tyre pressure? Going lower will make a difference i reckon, though I've never ridden a bike that light. But with the nobby nics they can feel skittish if the pressure is too high, I now that much.
whats the recommended pressure for nobbys?
I've slowly worked the weight of my 456Ti down, now sub-25lbs fully built with pedals, crud-catchers etc. But it still has full-width riser bars, a 140mm fork, 2.3 tyres and 3x9 drivetrain.
I'm not prepared to compromise on use, so it has to be strong (and light) - consequentially it ain't cheap.
light wheels = nervous handlingheavy wheels = hard work
Its not the light wheels that make the handling nervous its the fact they are less stiff, and also the fact that light tyres tend to be skinnier.
If you could produce wheels that were both light and stiff they've be just as good as the heavy wheels.
but lighter wheels have less thingy, wossname, buggrit...
gyro effect?
ie, lighter wheels are more easily deflected by rocks, roots, etc.
or not, just sayin...
whats the recommended pressure for nobbys?
Higher than I run! I think it's 30psi minimum or something. I usually run about 25psi in Rons.
I've never weighed, or known the weight of any bike I've ever had. I just ride the things.
whats the recommended pressure for nobbys?No idea tbh, but at 17stone, I find 35psi to be perfect for me, if you are lighter, well i'd imagine you can go quite a bit lower! I'd experiment with it a bit, as i have higher pressure if i'm on the road alot and you can really tell the difference in skittishness if i go offroad and forget to deflate the tyres a bit.
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