do you have any reference material to support the suggestion of increased liklihood of tyre failure with the higher Vr?
Fair enough question. The answer is not off the top of my head. The evidence comes from my recollection of reading numerous incident and accident reports over the many years I have been flying aeroplanes big and small. Some of these included tyre failure incidents. One recommendation by McDonnell Douglas does stick in my mind, however.
That is, do not abort for a tyre failure if the failure occurs at speeds more than V1 minus 20 knots. Loss of braking efficiency means V1 as a decision speed becomes invalid. MD would not have issued that warning unless there was evidence that tyre failures at high speed have happened. MD did not supply individual details.