Originally Posted by
framer
....acually V1 will change but not the other two....
Just to be pedantic, all the speeds are subject to change with a change to the thrust being used. Depending on whether the data is Vr-limited or V2-limited, the other will have to adjust to allow for the different acceleration capability between Vr and V2. (i.e. if you are using minimum V2 speeds, then in order to assure you achieve V2 at 35ft you need to start at a faster Vr when you reduce the thrust, and so on)
Oh, and I agree, use the speeds for the nearest weight (interpolating or rounding up per preference or table instructions).
I disagree with mutt on this; use of speeds from a weight too far from your actual weight may screw up trim settings and rotation behaviour. (I this case a couple of knots here or there wouldn't likely be critical though)