I've used them for the last three years on a KTM 525, 250, and now my new 500. Love the performance of them in the slick stuff and have run them with 0 PSI about 30% of the time trying to get traction on the slick wet clay. From my experience they do throw the wheel out of balance a bit more than a tube. On my DS bike I use spoke weights to balance and make sure you mount the lightest part of the tire next to the rimlock. One issue i have with constantly over the last three years is inconsistency in terms maintaining a proper seal. I can ride the bike for months with no issues then all the sudden the tire (not the Tubliss inner tube) will not hold air. Yes I've checked for holes, punctures in the tire itself but the air escapes from around the bead according to my tub of water and I maintain the required inner bladder PSI. This has happened to me on all three bikes at one time or another so its not rim specific. Anyone else had these issues?