Just to follow up with the 'Ride-On'. 2 weeks ago I rode 300 mi. ea. way to the Columbus, Oh. tech session. While riding around there, picked up a ringed flooring nail, right up through the center plies. Had I not had the R-O, I probably would have gone flat immediately, but we did not notice until the next morning, that it had gone flat overnight in the garage where we were staying. We had to put a plug in the tire, with 7K miles looking like new, but even though it got me home, I would not trust it. Just my personal preference. So I got another brand new General Altimax, same size, date code 0417, and put in 2 full 8 oz bottles of Ride-On. I paid $120 for the tire, installed, and the R-O was $14.95 ea. bottle.