I'm stuck against a brick wall at about 20 on mine. If I drive it easy around town it will get about 18-19, and it gets right at 21 running 70. Jumping up to 75 though dropped me back down to about 19 though. If I drive it with a moderate foot though and get a little frisky at times it can quickly drop down to 17 in a hurry, or even lower. Driving with an egg under your foot makes a big difference.