Ive had the avs es100s for 3 summers now, which i love, but im looking at the sdrives for replacements this summer. From the reviews i have read on tirerack.com they seem to be a better tire and they are basically the same price. they were supposed to be the replacement for the es100s but they seem to still be selling those too. I figured id chime in with this info since no one has responded yet, even though I have no first hand experience.