you use half an inner tube (including the valve) to line the rim (often a 26 inch inner tube so it pulls tight to the rim) make sure the valve core can be removed
then mount your tyre and try to inflate it, if the bead will lock you let out the air, remove the valve core, squirt in sealant and re inflate.
then shake the wheel around, cover in soapy water and watch for bubbles...
my explanation is a bit shit, so would suggest you read up a bit
look up ghetto tubeless on mtbr
you use half an inner tube (including the valve) to line the rim (often a 26 inch inner tube so it pulls tight to the rim) make sure the valve core can be removed
then mount your tyre and try to inflate it, if the bead will lock you let out the air, remove the valve core, squirt in sealant and re inflate.
then shake the wheel around, cover in soapy water and watch for bubbles...
my explanation is a bit shit, so would suggest you read up a bit