It's actually a single pivot on top of a single pivot. The initial shock is set at a relatively low pressure and works to soak up braking bumps, roots etc. The second shock comes into play once the first one has ran through all of it's travel, running at a higher PSI to absorb the bigger hits. The way it works with this second pivot on top of the first means that the rear wheel moves backwards too. Another clever little thing is that the pulley on the first link for the chain actually "locks out" the first shock while pedalling. I had a go on the demo bike a few weeks back and it was quite mad riding this 8" travel downhill machine and having it feel like a hardtail. And I don't just mean that in some marketing bullshit kinda way, it actually felt like a hardtail.
Is that a good thing?? or do mean when your sprinting?
It's definitely a good thing, though pedalling over some very rough terrain may be a little interesting (I'm still yet to ride one on a good proper downhill). Put it this way; How many DH bikes do you know of which you can sit on, stick in an easy gear and pedal UP the finishing field?
Oh ye that is a good thing. iv been told thats what the iron horse is like virtually no pedal bob
Unsecure image, only https images allowed: http://www.xxiv.com.au/wp-content/uploads/2008/03/legend_complete.JPG not a fan of the two tone, better in flat black. i dunno.. something i like about triangles on a bike..