It sounds like most posts recommend the ZR speed rating for the Pilot Sport A/S on a MYP. Is the ZR required or can you go with the regular R rating, ie 265/35R-21 MICHELIN PILOT SPORT ALL SEASON 4 XL as opposed to 265/35ZR-21 MICHELIN PILOT SPORT ALL SEASON 4 XL?
Apologies if this is a dumb...