I wanted to mimic this design on an ESK8, initially selecting 6" AT tires/wheels and a caliber profile rear split truck/axle for motor mounts. However, I decided on keeping it simple stupid for my initial design.
The wheels can be mounted facing outwards (as shown) or facing inwards. Hardware is standard 5/16. Multiple holes in the idler plates were added so that the wheel spacing can be adjusted.
Once I gather feedback and get a feel for this design using my existing urethane/street setup, I’ll work at creating a larger configuration with AT wheels/tires and coilover shocks.