Tubeless titbits:
If you have seasonal tyres, what have you found to be the best course of action for removing the old sealant? Scrape it off while still moist or let it dry out?
I am in the process of mounting my summer MTB tyres and It looks like I had cleaned the carcass a bit but the beads were covered in crud. I tried to mount them, but no chance. The air just whistles out.
Anyway, I tried picking some off but it was very crumbly. So, I soaked the tyres in a bucket of water overnight, refilled it with hot water this morning and was able to pull quite long sections off at a time. There are a few bits left, but i'm hoping they will come off with some vigorous rubbing later when they have dried out again.
The moral of the story here, I think, is to get as much of the old sealant off when you remove the tyre. I have done that with the mud tyre I have just removed and it all came off like soft cheese. A fair bit easier than the process of removing the baked on crap.
I've had tubeless road tyres for a few years now, I like them. My maintenance schedule at 4 month intervals. 2x top ups followed by a full service them (remove all sealant) as the build up becomes substantial. For a new tyre, I think the first interval should be <2mths. I had an experience recently where a puncture failed to seal due to the tyre being almost dry inside, the initial 60ml seems to have all been used up in coating the tyre/rim bed leaving not enough loose. I did find a few thorns in it (when tubing it.....always the backup) so maybe I lost a bit with those punctures.
Anyway, to someone thinking about making the switch, this may all sound overwhelmingly complicated and adding in an unnecessary layer of faff into your cycling world. But all in all, I think the annual faff time is roughly equivalent with tubes. The boon is that 99% of tubeless faff can be done at your convenience in your garage/garden and not at the side of the road.