I'm too lazy to do the math, but subtracting 40 from the front, and adding 40 lbs to the rear will change the center of grav more than most people realize. Remember also that the battery is in forward of the front wheel.Yeah. I do want to do up a system and free up a little space in the front. But I figure 40 pounds moved equals a total differance of 80 LBs. hehe