If you always want to depend on roadside service changing out your tire then a tire only is fine. They will have the tire removal/replacement tools to do this.
I went a further step in tire independence and got a tire and wheel, a jack and breaker bar and socket to be able to change the tire myself. I can handle a 60# wheel and the 140 lbs or torque for the lug nuts. A big tire, maybe not.
David
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