Got the new rear tire to match the ME888 front tire on my Harley EG from motorcycle super store today. The date code on the new tire is 4815 which puts it being built the 48th week of 2015. The date code on the dunlop tires I just recently bought from the same seller for the Superglide is 1916 which puts them being built near the end of May of 2016. I'm thinking the ME888 will be OK being only about 10 months old. How old is too old for a new motorcycle tire?