Another helmet question --- Arai this time

[markfly]

I tried on the Astral-X model yesterday...the person working the counter told me that the Large & XL have the same shell size with the liner thickness making the size difference. The Arai brochure I downloaded on the specs doesn't list the Astral series in the chart with optional liner thicknesses. In looking at the chart, it appears that the Med & Large share the same shell size...although I can't be certain of that.

By the way, this seems to be a very nice helmet...unfortunately they only had the XL to try on.

Anyone know?

Thanks.