I had the sc8 and the sidewalls tore on all for of mine. It was because the rims have hard ribbed plastic behind the sidewall of the outside part of the rim. When cornering the hard plastic rubs the side walls until it wears through. You can even feel the hard plastic inside if you squeeze the sidewall.

Some of the sc tires that have a different innner and out diameter are prone to this. I went to buggy badlands 17mm because the inner/out is the same and they have the most traction out of all the tires if tried (trencher, aftershock, sc8, bow tie, gadiator, slash plat 4x4, slash rtr 4x4, etc.)