2015 USATF Outdoor Champion Jared Schuurmans says; The rim weight of the discus is relative to comfort and skill level. Low rim weight discus doesn't necessarily go far and high rim weight discus are not guaranteed to go further. Finding a weight that is comfortable to the athlete and his skill level is the best chance in optimal distance.
Low rim weight discus in theory are designed for beginners and as the weight goes up the logic is the discus will spin faster. Making it more aerodynamic and carrying the ability to go further. However, if the athlete does not have the ability to spin the discus well in a higher rim weight, will result in a reduced distance because the discus will wobble and create drag.
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