Part of the idea behind center-lock wheels is that one center-mounted lug nut has less rotational mass than numerous lug nuts spinning around the center of the wheel. However, with only one nut keeping the wheel on, the setup often has to be bolstered to provide the same amount of security. Thus, any additional weight added to make it secure might be balancing out the positive effects the center-lock wheel touted in the first place.
Thus, a center-lock wheel primarily exists for quick swaps on a race track. You’ve seen pit crew teams change four tires in just a few seconds—they do that through the magic of the center lock.
