When building a dished wheel the side which has the smaller distance from the center to the flange can be tensioned 100%. Whether its 90 Kgf or 110 Kfg it doesn't really matter. The other side can only reach 60% to 70% of that tension. Since tension is not even you don't get as strong a wheel. It's still a good wheel but it's not as strong if the tension was balanced.