VR rating is the high speed tire, not sure of the limit, but, way faster than the Valk will go. The HR is the rating I used on mine, thinking I would never sustain speeds over 100 MPH, and the HR was rated for more than that.

Yep, the Valk came with "H" rated tires which is plenty. The ratings are for "sustained " speeds. I think V rated tires are for 149MPH. The problem with going with a higher rated tire than the bike needs is that the higher rated tires have a stiffer sidewall which will create a rougher ride.