It might not be the same scenario, but I’m using Stans Podium MMX (26″) rims with standard slicks (Michelin ‘sumpfin’ Run’R Advanced Lite).
I emailed Stans and Effotto Mariposa (Cafe Latex) a few times about it to make sure it was an approved configuration and wouldn’t be dangerous.
I think the rims are rated to around 17psi. Stans told me to use a maximum tyre pressure of 40psi, with an ‘absolute maximum’ of 50psi. If I remember correctly, they said the problem wasn’t with the bead (I was concerned about the tyre blowing off the rim), but with the rim construction (weight?) itself.
I’m using this combination on a recumbent. It shouldn’t make any difference, but the overall handling is different because of weight distribution, and the fact that I’m lying almost flat out. I find balancing and cornering a bit wierd. So, on a couple of occasions I’ve had a fright when it felt like the bike was about to highside when cornering. I initially put it down to me running low pressures in the tyres at the time (tyre pressure would have dropped, and was probably nearer 20psi).
I have noticed that the Blackburn track pump I was using was letting out a lot of air when I removed the nozzle after inflating the tyres. I bought a digital gauge which makes it easier to inflate the tyres then release air until the correct pressure is reached. With a newer pump I tend to pump them up to 45psi or 50psi, which allows for some air loss.
I haven’t compared the same tyres using tubes, so I can’t give any info about performance other than the bike feels fast enough, and it coasts really well.
The over-riding positive impression is one of supreme comfort! I just don’t notice rough/broken road surfaces. The downside is the fear of losing control, which makes me corner and descend fairly slowly. However, that might just be down to me. A few months ago I fitted the original wheels and tyres (Schwalbe Marathon Racers), anticipating the bike might handle better with those. However, it didn’t give me any more confidence after I tried cornering at higher speeds, so I suspect it’s a weight distribution problem with my particular bike.