These wheels are amazing, its remarkable how these wheels just maintain a high speed and track rough terrain extremely well.  When I'm flying down the hill the wheels feel very light and they are quick to accelerate when I start the climb uphill. I had no idea how much my last wheel set was holding be back, from the first ride around the parking lot to flying down one of my local trails it was like someone had added a motor to them that was propelling me faster then ever before.