Beadrider Anyone

[oldgoat01_imp]

Alas, my beadrider went with my last bike. I've found for the nice balmy summers of the Carolinas, the beadrider really does help with the airflow. So, with Father's day fast approaching, I thought I would plant the seed of a beadrider (and in my case, one has to till the field, sow the seed, water the crop and harvest). In any case, the CB11 is not listed so in measuring I came up with a 13x13 option. However, the measuring process is a bit subjective so I was curious if anyone had already fit a beadrider on the stock seat and, if so, what size they had. (If anyone has thoughts on the Airhawk 2, I may be interested in that as an option as well. I just don't know how well it works in the heat and humidity)
Thanks