You may be going too wide. Here's a quote from Jim Wendler in his "Casual Friday" article on raw squatting:
[i]I think a lot of people have been misguided, and part of it is my fault, on the width of a squat stance. If you are looking to be a wide stance squatter, this doesn?t automatically mean that you squat with your feet almost touching the sides of the Monolift.
I think people have automatically assumed that everyone squats as wide as Chuck Vogelpohl. This is definitely not the case. To maximize your hips AND your legs, your stance needs to be adjusted accordingly. A wide stance is usually defined as being slightly wider than shoulder width or wider.
The key is that your stance needs to be wide enough so that you can sit back into a squat but not so wide that you can?t bring your quads into a squat. Everyone is going to be different but generally people will take the stance that makes them feel more powerful once there is a significant weight on the bar.
From there, you can tweak your stance. Because you are not wearing gear, your hips must be taken into account.
Now if you are training athletes and I hope they are not wearing squat briefs, you need to bring your stance in to an ?athletic? stance.
What is an athletic stance? Get into any position that mimics an athlete: a linebacker, a volleyball player, a shortstop, etc. They all have the same basic stance. It is slightly wider than shoulder width. If it?s not, then you need to talk to the sport coaches and see what the hell they are teaching their athletes.[/i]