I too am considering the C3's for my next rear tire. That tread wear after 3100 miles is amazing! How many miles do you usually get from your previous tires? I'm on my second Commander 2's and have only been able to get 12K miles tops, not like the advertised 20K miles. I also read other reviews that mention vibration issues from the C3's, mostly from the front tire. I run Bridgestone's on the front so this doesn't apply to me. I also highly recommend using Ride-On tire sealant and balancer. Best stuff to keep the air in and balance the tires without using weights, and does a better job at it.