Team 201
6 years
2 CIMs
4 1.5 inch wide, 6 inch diameter custom machined aluminum wheels
No non- drive wheels
Chain drive from a 2-speed transmission
Skid steering
No sensors
Success- really fast, good amount of power, no reliability issues
Problems- can't turn in high gear
Next year- not my problem

I'm a senior, though I hear my team is trying for swerve drive next year... we'll see...