So the new tires arrived today as did the last of the tools to DIY on the R1100S. I will be replacing the Michelin road pilot 4 2ct as the front tire wear bars are close. The DOT manufacturing date on the old tires on the bike I bought a few years ago say they are 7 and 8 years old. The guy I bought it from had it garaged as do I. I just wonder if the manufacturer hype re 5 years is valid? Can tires last longer if out of solar degradation, or do the compounds really deteriorate even in a controlled warehoused environment? When I take the bike out and ride, I enjoy my twisty 2 lane roads at old guy speeds,(no knee drags). Messed up fire smoke here for the last few years so not a lot of miles done. Just wondering if the rubber goes bad regardless.