I just got a set of flow Ex's for my freeride bike and mounted the front up tubeless to a "Tubeless Ready" Muddy Mary in the exogrid sidewall. Easiest mounting I have ever done. The fitting on my air compressor broke so I used a floor pump and it literally pumped up like there was a tube in there I was inflating. I didn't have to go all anaerobic pumping as fast as I could and spraying out sealant or any of that drama. I was so relieved and impressed.