idk about the coopers being discontinued. i know they did replace the atrs with the at3. my dad has always had the cobras on his sabre nd they have been good as long as you keep the pressure right and dont let it run on the sidewall.the kenda kenetica has a similar tread pattern to the cobra. set of 4 is around $250there really isnt a whole lot of selection for that size but a trailer tire wouldnt wear out near as fast but its all up to you