Hi All, We added some resistance to the rear leaning wheels to add some stabilization for training. There is just enough to keep the trike from falling over but it seems to help new learners quite a bit. 10-15 feet of travel is doable with first practice (15min),http://youtu.be/utaBjfLidhE PSI at higher speed seems to reduce also. We'll compare to pivot resistance someday... Cheers, Vi