I’ve never installed a tubeless tire on an airplane wheel before…

The main wheel hubs come with brakes attached already.

We started by removing the brakes

Then we unbolt the two halves of the hub.

We slip the O-ring that seals the gap between the two hub halves over one half of the hub.

We then bolt the two halves back together with the tire in between.

Note the little “V” that marks where the valve stem should line up on the other hub half when bolting back together. We made sure to tighten to the recommended torque settings in the MATCO documentation that came with it.

We then roll the O-ring down to the groove between the two hub halves.

After this, we pour in a few ounces of latex tubeless tire sealant into the tire, which will seal any tiny air gaps where air might leak out.

I find this next step a bit funny. We rapidly inflate the tire by pumping air in through the valve stem, while simultaneously trying to push the tire outwards in all directions. For a while, the air just leaks out through the large gaps between the tire and the hub, but eventually… just for a moment… we press the tire just right and all the gaps are nearly sealed with the tire pressing against the hub. Then all the air rushing in through the valve stem stops leaking and builds up enough pressure to hold everything in place.

Then, as we keep inflating the tire up to the recommended 25PSI, eventually the tire “snaps” into place against the rim. It is quite a loud snap, and the first time it happened, I thought we burst the tire or something. But the pressure was only about 10-15 PSI when that happened. It was just the sound of the tire snapping onto place on the hub.

As per the instructions on the sealant bottle, we rolled and bounced the tire around a bit to even out the sealant inside, and will check the pressure in a few days to make sure that there are no leaks. But for now, it looks pretty good.