I found my bum only hurt after long rides, and as I know which these will be I bought some Altura gel cycling shorts for £30. A vast improvement and I managed a 6 hour ride home from north wales without problem. Cheaper and keeps the sharper look of the original seat.
In the sales blurb for the PR4 it states 'Both the standard and Trail tires utilize a similar carcass to the Pilot Road 3 but with a steeper, more triangulated profile for quicker steering response.' So what you are feeling is the effect of falling off of the point of the 'triangle' which gets...