yes the tread lasts but these dryrot like nothing else! i hav e them on 2 vehicles i drive only a few thousand miles a year and both sets totally shot from dry rot in 10 years at 300$ per tire this is unacceptable
i have run a commercial lawn care business for almost 40 years and have run my 2 strokes on 40/1 twc3 oil mostly. not one oil related failure in all that time