Rich, Those little guys deserve a decent burial. I'd bet they are 15 years old at least. Hard to justify changing them when you only run 50 miles a season, but I think I would replace them next spring for the cheapest rubber I could find that fit. Mike -----Original Message----- From: Rich Makela Sent: Tuesday, September 24, 2013 6:00 PM To: For and about Montgomery Sailboats Subject: M_Boats: Trailer Tire Sidewall Cracks I've noticed cracking on the sidewalls of my M-17 trailer tires, and I'm trying to determine whether it poses a threat. I've attached a PDF with photos. The starboard tire is worse than the port tire. I can't find the code that is supposed to tell me the date of manufacture. They are both Reynolds bias-belted tubeless tires. I only haul the boat from the lake to my home, and then to storage - less than 50 miles total. I've found information on Goodyear web site about RV tires stating that sitting around and not moving can cause sidewall cracking. Can anyone out there with tire experience offer any advice? Thanks. Rich Makela M-17 #233 - Harmony