I have been noticing that when it is particularly windy or when I am going particularly fast that my helmet wobbles around on my head a hell of a lot! it's very uncomfortable and sometimes painful as it smashes against my skull lol The helmet fits well around my cheeks and feels fine when it isn't windy or when I'm doing under 120 say for discussion's sake It's an Arai helmet, so is it possibly the shape isn't aerodynamic enough? I asked my partner if it happens to him and he said no, so I thought I might ask the question here! I have tried a shoei xs and it squeezes my brain, the shark s is too big also. My Arai is a small, and used to squish my head until some of the padding wore in a little. My helmet is a year old. thanks!