Sonia767,
Remember that a Balanced Field Length may be less than the actual runway length. In your case above assuming that V1=160 Kts uses all of the available runway, your V1=130 Kts wont use the same amount of runway but it will still be a Balanced Field!
VR is a function of V1 and would therefore be associated with the V1=130 Kts, you wouldnt use the VR associated with the higher V1.
Mutt.