The speeds will fall out of whatever AFM analysis is figured for the runway. Generally, there will be a range of speed choices unless the runway is quite limiting.
VR is linked mainly with V2 such that V2 is achieved OEI with rotation commenced at VR.
Where V1 fits in the equation will depend on the match of aeroplane and runway lengths (especially ASDR/ASDA) and what you choose to do with V1/VR ratios.
If ASDA is not limiting, there should be no reason, generally, why one couldn't push V1 up to VR if that's what floats your ops engineering boat. The AFM data will take care of the backroom certification requirements.