Inflation device for tubeless tires

A wheel assembly comprising:

• a wheel comprising:
• an outer crown or rim for mounting a tire, comprising a cylindrical channel wall having an outer channel surface and an inner channel surface, said cylindrical channel wall being crossed by a channel hole having an inlet on the inner channel surface and an outlet on the outer channel surface;
• a hub for fixing to an axle of a vehicle, the hub being integral with the outer crown, having an outer hub surface and an inner hub surface, said hub being crossed by a through-hole for inflating the tire, having an inlet on the inner hub surface and an outlet on the outer hub surface, and a hub hole having an inlet on the outer hub surface and an outlet on the inner hub surface;
• a first fitting separably applied to the hub, provided with at least one first inner conduit for connecting the outlet of the through-hole with the hub hole;
• a normally closed non-return valve, housed in the first fitting, along the at least one first inner conduit, openable to allow air under pressure to enter from the inlet of the through-hole;
• a second fitting, provided with at least one second inner conduit, applied separably between the hub and the outer crown to connect the outlet of the hub hole with an entrance of the channel hole;
• wherein the second fitting comprises:
• an attaching portion provided with holes for inserting bolts in abutment with the hub, and in contact with the inner hub surface;
• and
• a perforated shank protruding from the attaching portion engaging with the channel hole.