when i set my RC10GT2 down on the ground and try to push it, the back wheels are locked, so it wont move.
but when i pick it up and spin the wheels, they spin fine.
it is just the back wheels that dont spin.
also, is there supposed to be bearings on the back wheels?? there are on the front, but not on the back.

so can someone tell me either what is wrong, or if that is what is supposed to happen?
thanks