Re: Are all shoei X-11 helmets the same size shell
This reply probably won't help to answer your question, but I've owned two different Shoei helmets and experienced the EXACT same thing you are describing. The helmets were the RF-800 (a few years ago) and a 2001 model TZ1. I've since gone to the Arai (Signet GT) and have had NO problems. My Shoei's fit snug and comfy (also left a few "impressions" on my melon) so I know it wasn't that they were too loose. You, my friend, might not have a "Shoei head".