IRC TR-011 Trial Winner 4.00-18 Tubeless Rear Trials tire works very well in a wide variety of conditions here in the Northeastern part of the United States. I have the best traction in muddy slippery conditions when the tire pressure is dropped down to between 3.5 to 4.0 psi. In dry conditions 4.0 to 4.25 psi works well. IMHO this IRC rear Trials tire seems to work just as well with a Michelin or Dunlop rear trials tire for a substantially lower cost. Bike is 2022 Beta Evo 250 Factory Trials motorcycle.
I like the factory grips and was very pleased to see that you stocked them. I do not like "cushy" grips. These are tacky and do great. These replaced the grips that came new with the bike. Had 76 hours on them.