Renault's initial proposal was based on the Renault ZM, or Renault R35. It had a similar smooth curved cast hull to that of the light infantry tank but was much wider and had six road wheels and double tracks per side – to avoid having to design a new broad track. It had a modern torsion bar suspension and, like the originally proposed G1L, a (rather outdated) Cleveland transmission. The suspension protection plates formed an integral part with the hull's main armour.