Unless they are huge bumps, they shouldnt cause it to sit more than a few mm higher than if the bottom were flat. Hobbyking says it is 25mm thick, meaning from the bottom of the bumps to the top of the batt should be 25mm... Thats how every other company claims their heights I believe. What car are you running this is?
89% of Revos are racers. If your Revo can out-bash and out-run a Savage, put this in your sig.
SMOKE TIRES, NOT DRUGS
46.7% of all statistics are made up on the spot and have no real value or truth.