I never liked the idea of putting non tubeless tyres on tubeless rims and always thought that if i ever changed.. i would do it with proper stuff from the word go.
The first tyres i fitted on 819s beaded bone dry around 9psi. rims were cleaned spotlessly and the beads were also cleaned (bit dusty) before fitting the tyres.I have used other tyres on those rims since and got on fine for years with them fitted bone dry. Air loss with tubeless kenda kinetics fitted dry was a case of inflating every 5-7 days from what i remember.
No mess. Funny that. ;O)
Currently been using crossmax ST for a few years and again, no probs at all. The other bike has xt tubeless wheels that had tubeless hutchinson cougar and cobra from new and they were perfect for months from what i can remember (no fluid)
I then put bonty mud x on the xt wheels for a bit and they were fine too (even with bits of old fluid still stuck on them)They have since come off and ive fitted spc maxxis minions with 2 scoops of stans and once fitted,they need topped up every 4 or 5 days with around 10 psi. They seeped a little to begin with but i didnt make a song and dance about it as i knew i was fitting a tyre that wasnt designed for it in the first place.
I since span the wheel every other day to keep the fluid sealing up any pin holes and now its all fine and dandy.
I even raced them around 20psi (13.8 stone!) with not one problem.
Taking the tyres off to swap other tyres is no big deal either. the fluid makes the rim wet and you put a further few scoops into the next tyre, fit it and inflate. Then go riding with no worry of snake bites.
I have always carried a tube and since 2005 i have never fekked a tubeless tyre and needed to fit a tube. You should carry a tube and give it a go. Seems stupid putting those horrible quality hoops of rubber in there for no reason at all.
Do you folk drive cars with tubes? :O)