An option could be to do a shorter geartrain in the back of the robot, and then do a free spinning wheel in the front. You can see this on one of 1961z Riptide’s bots for Change Up:
62A’s CU reveal:
and 2616J CU:
This is an easy way to extend your base without adding an obnoxiously long geartrain, at the cost of your front wheel not being powered.
