Yea 17.5.. Sick, lets see who can gear their car the best then get called a cheater for being fast.. And helps better with what lines to take? All the 17.5 buggies take turns as wide as possible to clear certain jumps or just don't have the power for certain jumps so have to roll them or just come up short. Wouldn't you rather have enough motor to hit that one triple cleanly or that double on whatever track you are at and have the torque to control your car better in the air? 17.5 geared high with no torque and power to put down in which the way these cars are made. I can guarantee you these cars are not built and designed on track using a 17.5 motor