EVUL Guides · Gearing & Drag Battery Sizing

THE GUIDES

Pinion, spur, ring and pinion: how the gears multiply, rollout and top speed, in pictures.

Size a 132 ft drag pack by internal resistance and sag, not the label C rating.

Each guide opens as a PDF. Pair it with the matching calculator: Gearing · Battery Sizing.

Weight, gearing, kV, cells and pack IR → peak amps, sag and motor load. Live tuner plus a 3-car table.

Motor pinion → spur → diff pinion → ring → wheel. Final drive, rollout, top speed and motor load.

Find the lightest mix of cells and supercapacitor strings that holds voltage through the launch.