They had aftermarket siping which I will always get done after my rain handling experience with this on the Toyo M/T. When they reached their last 6 months or so of life most of the siping had worn away. Since I had a Titan snow run meet planned the next day, I took them back to a different Les Schwab Tire Center and they said no problem, and sliced them again for free. The siping wasn't the panacea on a sheet ice hill the next day, (but may have helped), but I didn't know enough to air down my tires back then. The ice was really bad though, with one Titan spun out and people falling down, and while parked waiting, my Titan actually slide a couple of inches backwards down the hill!how did they handle in the rain and inclement weather?