Quote Originally Posted by HoosierGiant View Post
My helmet, a Bell also, has a little, round, black rubber ring on the chin strap -- adjust everything once, then slide it right up to the buckle, and nothing moves. Of course, after almost four years of use, it finally broke a couple of weeks ago. But, I've not had any issues with straps loosening since then, so perhaps I'm just lucky. In any event, I use small silicon ponytail holders to achieve the same effect when helping kids with helmet adjustments/fittings.
I've always used that little o-ring to keep the strap ends from flapping. But I really like your idea to keep the buckle from moving- I'm definitely going to try it!

On a related note, you can also buy small rubber o-rings in the plumbing section at the hardware store.