[EricH]

Originally Posted by swwrobotics

Don't bumpers also count towards the weight limit?

No and yes. There are 3 separate weight limits:
1) 120 lb for the robot, minus battery and bumpers.
2) 20 lb per bumper set.
3) 30 lb withholding/carry-in fabricated item limit--bumpers are included in this weight, if they aren't in raw-material form.