A tubeless story - inspired by some of the comments here, I figured might as well learn to work with tubeless. The rear wheel on my Cervelo (CL50s with Specialized RapidAir Turbo 26c tires) wasnt holding air all that well, and it's been 3 months since the bike shop added sealant, so i decided to top it up myself.

Started with the valve at 6, removed the core and immediately, sealant started burping out of the valve (bike was on the ground - my stand is at my other residen ce and i have yet to move it over). So i rotated the wheel so the valve was at 8, and that helped. Used a tube and added a couple of glugs of sealant. Replaced the valve core, put the valve at 12 and tried to pump. After about 10-15 psi, the wheel refused to hold air. Trouble shooting, i could see that the problem was with the air coming out of the water drainage hole on the side of the rim. Asking a friend, i was told that perhaps the rim tape has been moved. Pushing the tire aside and looking at the tape, it seemed more or less ok. After much cursing, I decided to put the valve at 6 and pump - lo and behold, it worked. The tire snapped into place at 70psi and all seemed good.

Next up - front tire. This time, I removed the core with the valve at 3, added a couple of glugs of sealant as before, replaced the core, moved the valve to 6 and pumped. It pumped up to 90psi but i did not hear the tire pop (there was a pop when i deflated the tube, however). Tire seems to be holding air. What does that mean - is it seated or not?