What is most affected when the total weight of an iron is altered by replacing a 60-gram graphite shaft with a 110-gram steel shaft?

When the total weight of an iron is altered by replacing a 60-gram graphite shaft with a 110-gram steel shaft, the most affected aspect is the feel of the club.

The feel of a club is largely determined by its weight balance and how that weight influences a golfer's perception of the club during the swing. A heavier shaft typically leads to a more solid feel at impact due to the increased mass, which can help some players feel more connected to the club, particularly during the transition from backswing to downswing. This enhanced perception can instill confidence in the golfer's ability to control the shot.

Changes in swing speed can occur as a response to alterations in club weight, but the direct and immediate perception of "feel" is generally the most prominent effect caused by such an addition in weight. Notably, grip size would not be directly impacted by shaft weight change, and while ball trajectory may also be influenced over time as swing dynamics adjust, the immediate sensory feedback related to feel is the most significant outcome from switching shafts.