I recently put a pair of these on my bike for our Alaskan trip with Sgt Bilco (recommended by skygod). I appreciate thst 400 miles of motorway isn’t their forte but I note a central groove wesring in the rear tyre already. I have these at a slightly higher pressure than I would normally run ( normally 36f 42r). I can’t remember where I got the pressures from but what would the illuminati suggest?