Sirius is a very popular FLL robot design that many beginners choose to start off with. It has a lot of great features and qualities that make it unique and a great starting point for an FLL. However, one flaw in Sirius’ design is that its tall motorcycle wheels are just a tad too short, meaning the robot pitches slightly forward instead of sitting perfectly level. This can make mounting FLL attachments a bit tricky. Today, I discuss replacement of the smooth LEGO motorcycle tires (#88516 ) with the slightly taller knobby tires (#11957) in order to level Sirius’ stance. I also discuss the other effects of switching out the tires.
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