The US T32 Heavy Tank was a prototype, fielding the T15E2 90mm main gun. It was based on the M26 Pershing, but up armoured to 203mm thick frontal steel. The main gun required a large counterweight at the rear of turret, which meant it had to be enlarged, requiring a bigger turret ring. This of course meant that it needed a larger hull to accommodate the new engine and transmission required to propel the vehicle. The hull was lengthened to do so and a 7th road wheel added. Four prototypes were built from 1945 – 46. It never entered serial production.

The US T32 Heavy Tank Spec’s

Armament: x1 T15E1 90mm main gun / x1 12.7mm MG/ x2 7.62mm MG’s
Armour: 203mm (steel)
Crew: 5
Dimensions: Length 7.07m / Width 3.51m / Height 2.78m
Weight: 53.6 tonne
Engine: Ford GAC 12-cylinder 770hp
Speed: 36km/h
Range: Unknown