Old Guy
Well-known member
Dunno. I don't have mine here anymore, but I thought I remembered the "F", so I checked my owner's manual, and it's there too. Maybe they got a boatload of them at some point and used them up mid '13Mine say BT023R and then inside a little oval area in a different type font is an "E". Same on the front. I would guess the extra letter inside the oval is something to do with the production run? The F & R are what tip you off that they are the OEM version tires.