Ski Info. ( Fin Adjustments For The Serious Slalom Skier )
 
For skis with ajustable fins
The adjustable fin on slalom skis is designed to fine-tune the ski's behavior, which varies between individual skiing styles, skier weight,boat speed, and site characteristics. There are three types of adjustments that can be made to the fin: horizontal, vertical and diagonal. Differences of a few thousandths of an inch are known to make the difference between a personal best pass and a fall.

Horizontal Adjustment
A horizontal adjustment forward (toward the tip of the ski) lifts the front and drops the tail during an on-side turn. A horizontal adjustment backward drives the front into the water and raises the tail.
Vertical Adjustment
A downward vertical adjustment (out of the ski) improves stability and holding power, while and upward shift makes it easier to turn.
Diagonal Adjustment
A diagonal adjustment of a lower longer front makes the fin fuller, and there fore drives the tip of the ski into the water in and off-side turn. A fin with a shorter front raises the tip of the ski.
 
Problem Solution
  • Difficult to initiate turn..............Decrease fin depth (Vertical Adjustment) and/or move fin forward (Horizontal Adjustment)
  • Breaking at the waist during off-side turn............Decrease front fin depth (Diagonal Adjustment)
  • Unstable and/or too fast into turn...........Increase fin depth (Vertical Adjustment) and/or move fin backward (Horizontal Adjustment)
  • Too much ski tip in water on both left and right turns............Increase fin depth (Vertical Adjustment) 
  • Too much ski in the water during off-side turn causing breaking at the waist...... Decrease front fin depth ( Diagonal Adjustment) 
  • Too much ski in the water during on-side turn.............Move fin forward (Horizontal Adjustment)
  • Too much ski tip out of the water during on side turn ... ......Move fin backward (Horizontal Adjustment)
  • Difficult to initiate angle across wakes.............Move fin forward (Horizontal Adjustment)
  • Ski overturns and gets too much angle across wakes..........Move fin backward (Horizontal Adjustment) 
  • Ski changes edges too slowly..........Decrease fin depth (Vertical Adjustment) and/or move fin forward (Horizontal Adjustment)
  •  Ski is too responsive..............Increase fin dept (Vertical Adjustment) and /or move fin backward (Horizontal Adjustment)