No point converting to tubeless if your not going to benefit from decent tyre pressures
Yes, exactly my thoughts. If the UST RQ's were a lot cheaper, I'd take a chance. However, at £80 a pair, I thought I'd do a bit of research first - 'cos, as you say, if they can't be run reliably at low pressures, it'd be a reet waste of money.
Thanks to all for responding - From what you're saying, it sounds like they'll be fine in the 20-30 psi range.
p.s. Scienceofficer, just out of interest, do you run the RQ and X-King as a front & rear combo? I'd wondered about an X-King on the rear, but wasn't sure how they sized up (guy at LBS reckons the 2.2 X-Kin is a lot smaller volume & width than 2.2 RQ(?))