pic: What Happens When You Go Too Fast...

[Engineer]

That's not from going too fast. Most likely you lifted one drive side of your robot off the ground and held it at full throttle. When it came back down the momentum in the drive train tried to put all that energy to the wheel and snapped the spokes. In race cars when you hop a tire at WOT you can blow a rear-end, drive shaft, axle shaft or transmission. Even when I used to race RC Trucks, when you came off a jump you had to let off the throttle or you would shatter titanium axles as you hit the ground. It comes down to driver error when this happens.