Finally broke the bead on the other side of the wheel. Used a mixture of methods...the jack and landy weight to hold the bead breaker firmly in place, so I could care carefully position the bead breaker blade on the tyre. That got it shifted.
There was a tube in the tyre, but I'm pretty sure the wheels are actually tubeless. The ridges aren't as obvious as @dag019 's photos, which is why I didn't really notice the profile from the outside, but there's definitely something there.
View attachment 222066 View attachment 222067
However, despite getting the outside rim off the wheel fairly easily, I can't get the inside edge off. It's a shame, as in the video @Blackburn posted in another thread, made that bit look fairly simple. Even with gloves on, I'm a bit wary of sticking my fingers between the bead and the rim, and I can't make the levers work.
So out with the angle grinder.... Nearly through, but then it started raining just as I got the the tricky bit near the rim. So that's all for today, and I'll see if I can find a sharp cold chisel next time I get a chance to tackle it. Not sure I can cope with another three of these...
Yes that is indeed a tubless rim so you could run a tubless set up. Depending on how well you know you landy and how old it I would not guarantee that means they all are, my series had a mixture of rims when I bought it. But a tube may hav ebeen fitted as it is cheaper than replacing the tyre after a puncture.
I would not worry too much (obviously being a little sensible) about getting hand in between the rim and the tyre. As long as you have a bar in there that will act as a safety measure meaning you cannot trap your fingers (and even if you do trap them it "just" hurts and from my experience at least doesn't do any lasting damage). To remove the rim from the tyre at this point you want to lay the tyre on the ground so you are removing the rim upwards out of it. Put a single bar between the rim and they tyre and leaver downwards so the rim is sitting at and an upwards angle and then stand on this bar with one foot to hold it in place. You then use the second bar to work around each side of the first (method two in the second link) while the first bar you have a foot on stops it slipping back into the tyre.
Link (about 3min in)
Link (method 2 if you are using shorter bars)