Madox-kart competition - Google Groups
Dec 07, 2011· I took a look at the tamiya gearboxes on little , though, and they start nice and cheap (~$6 for a one motor one with axle shaft), and have a number of advantages, including that they're designed for several different gear ratios, giving participants more to swap out and play with to try and optimize the bot. Plus, swap out the wheels and change the gearing and you have passable sumo-bots!