Here's a few specs...
The drive consists of:
12x - 4" VEXPro Traction Wheels in 1.5" wide configuration
2x - VEXPro 3-CIM Ball Shifters with 9.07:1 High Gear and 24:1 Low Gear
22x - 50-tooth VEXPro gears for the wheels and idlers
4x - CIM motors (2 on each gearbox)
2x - MiniCIM motors (1 on each gearbox)
- Each wheel is combined with a 50-tooth gear via a VEXPro Versa Hub.
- Two wheels are directly driven via Hex output from the gearboxes.
- All 6 wheels on each side are driven via connecting 50-tooth idler gears (not shown in this picture) in a 1:1 ratio.
- The wheels are aligned on a 32' arc, allowing for easy turning with minimal scrub.
I got dragged into FIRST against my will, and it was the best thing that's ever happened to me. - Liz C [more] 
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