I bought my trike in 2015 and the rear tires were new or so i was told. I have put about 16000 miles on them. I am wondering even though it has always been garaged stored and taken good care of if I should consider getting new ones, before we take a 1200 mile trip next month. It has Goodyear wide radials on it and they still look new, no sidewall cracking etc...I did a search for rear tires and not a lot of threads showed up..
Joe