We leave the valve stem core out until both beads seat. For a beadlock wheel, we find this is the easiest way to get that inner bead seated. For a non-beadlock wheel, sometimes you need to do this and use a strap or put it back on the bucket and get a friend to help push on it. We use our soapy water lube for this step to help get the bead on, but also we can see if the bead is fully seated because the soapy water bubbles wherever air is escaping. Once it is holding pressure, put the valve stem core back in and inflate normally. Beadlock guys, recheck the torque on the bolts periodically.