It's the steel cable inside the tyre bead that is holding the remainder of the tyre on to the wheel.

You have to cut through the steel cable in the tyre bead to release the tyre from the rim. without damaging the rim sealing surface.

I've had to do this a couple of times with old tubeless motorcycle wheels and tyres.

Not easy.-I remember using a Dremel with a very small cutting disc to get through the steel cable in the bead.

If you damage the tyre bead sealing surface of the rim, you will need to have the rim TIG welded and machined by an alloy wheel specialist.

Edited by focussed on 29/03/2024 at 23:50