An R5 Dunlop is at least 12 years old(probably older)so I would assume it is "brick-like" hard now. Good tire back in day and hard to get. The R5 and R6 were out the same time with the R5 being the harder one of the two. When they came out almost all slicks were asphalt tires. Would have to wonder how it didn't dry rot after all this time.