Yes! This has to do with the minor differences in width between the wheels of Sparkis, and as the wheels wiggle on their motor shafts over time. You can adjust this number by opening the Sparki.h file (located in the arduino core library file, if you post your operating system I post where), and changing this line:
#define TRACK_WIDTH_CM 8.51 //tire seperation in cm
And increasing and decreasing that number. Because you’re going a little over, I would slightly increase it. We have future batches being glued on and calibrated at the factory.