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Im not sure im doing this part right.
Im holding the tire against my groin with the valve furthest away and pulling the tire towards me, feathering it all the way around.
I then put it on the ground valve side down to try and lift it over, but this would seem to loose all of the slack I just created.
I will practice more, apologies for the further filth.
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Do it the other way. Rest it on the ground with the valve at the top near your man/lady parts and stretch the tyre downwards. With the newly-found slack on the non-valve side, use your thumbs to push the unseated bead over the rim. Little bit on the left side, little bit on the right side and eventually the whole thing should be seated.
Grab the tyre either side of the valve and drag it away from the valve towards the other side of the wheel.
What you are doing is creating more slack at the non-valve side of the wheel and from there it should be easier to pull a bead off.