I just got my tubeless wheels built and was going to use Orange Seal initially, but I have the 23 PRO Ones. I use NoTubes sealant in the mountain bike tires and have for years but since I have some Orange Seal (used on the Fat Bike) I'll guess I'll use that thigh I prob still have Notubes/Stan's sealant left. I have been using the Conti 4000s for a while and recently switched to Vredestein Quattros or whatever. I prefer the Vreds for comfort...speed seems similar. If we continue with this good weather, I'll report back soon. The Contis were pretty harsh over road gaps and jolts. Looking forward to trying the Pro Ones soon.