The following information was copied from: Nuclear ABMs of the USA
The Nike Zeus A is aerodynamically very similar to the Nike Hercules, just scaled up. However, the Nike Zeus A was designed for a very different mission - it was designed to perform an interception of ballistic missile RVs at high altitude. Like Nike Hercules, it was a two stage missile but instead of using the Nike Ajax booster, a new booster was used which was the largest single chamber solid rocket motor produced in the US at that time delivering over 450 000lb of thrust.
Dimensions
The capability of the missile was constrained by the 200 mile range restriction that was issued by Secretary of Defence Wilson in 28 November 1956. This restriction was rescinded 12 months later once Sputnik 1 had orbited the earth. This then allowed the US Army to then develop the Nike Zeus B which overcame some of the limitations already present and known in the Nike Zeus A.
U.S. Army
Length: 13.28m (44ft 3in)
Diameter: 0.91m (3ft)
Span: 3m (9ft 9.6in)
Weight: 5,000kg (11,000lb)
Range: 320km (200 miles)
1st Stage Motor: Thiokol TX-135 450,000lb thrust
2nd Stage Motor: Thiokol
Guidance: Radio command
Warhead: Nuclear, 20kt
First Firing: 26 August, 1959