I think that is more of a person thing that a compatibility thing. I have a Bauer IMS 9.0 helmet. I originally bought a size M cage, but had to return and get a Large. I will say that when you put a size bigger on the cage, it is also a tad wider, so I have to squeeze the cage in to get into the hooks, but not much. Fits perfectly. I would think that you'd either match you S helmet with a small or medium depend on the length of your face.
Date published: 2017-05-24