They'll work......they just won't be optimal for the following reasons:
- A little short...a 180 or longer would be better...so you won't be able to carry as much speed and they won't be stable at speed.
- Probably not a full race construction...won't hold as well as you'd like, may bend too easily (= overturning).
- May have more sidecut than you need (= overturning).
- A little wide to hold in a GS course. For example, I have a pair of Head IGS RDs in 183 that are 102-66-87. Why does width make a difference? Per what Ron LeMaster says, the ultimate holding tool would be an ice skate, because the edges are right under the centerline of the foot. You can make a ski behave like an ice skate by doing one (or both) of the following: (1) Narrow the ski (2) Raise the platform (up to the max of 55 mm currently permitted). Either or both will effectively put the edges closer to the centerline of the foot. In addition, all other variables aside, a narrower ski is quicker edge to edge, a characteristic more in demand in today's GS sets and speeds...