Rammers are ramming robots, they damage the opponent throwing themselves against them or pushing them against the borders of the arena.
They usually have 4 (or more) wheel drive,wheels with high traction,
a sturdy drive system,robust armor, high resistance to impacts,and they
don’t have weapons except for their passive shields.
In general, they are invertible (they can be driven upside down).
They need to be capable to push at least 2 times their own weight.
They are effective against robots with spinning weapons, such as spinners,
drumbots and sawbots.