So i am running the Avon AM26 Roadriders right now (110/140) and after about 6500k miles I'm about due for a new rear. I do really like these tires and they last decent amount of miles, especially for the daily freeway commuting that i do. First dumbass question is, can i put a different brand on the rear add long as it is bias ply like the front? Second question is, avon makes a 140/75-17 Cobra tire, but says it is a front tire, can this be used as the rear? .......let the yelling, name calling, sighs and eye rolling commence. I will start it off with this emoticon.