This portal axle was designed to fit under a 1:12 - 1:13,5 scale Unimog. BamaTech Diff is required with extra long pinion gear. All standard 1.9" rims sould fit to this axle. The width over all is 170mm. With 5mm Hex and 0 Offset rims, a total width of appr. 195mm is possible. So this axle will fit perfekt unter the Tamiya U406 or Dickie U300 body. Portal axles for other diffs are comming soon. So stay tuned!