My mains are 8.5-10 10 ply tubeless Michelin Airs, and I was able to order three from Desser($1776), so I'll have a spare after replacing current tires. I will get a tubed 6.0-6 8 ply tomorrow, and I think it is in stock too, in the Michelin. The Goodyear Flight Custom 3 is the one that is out of stock and from what the barely capable salesperson knew there is no real difference other than brand.