The chassis of the Phantom II was completely new.
 The front axle was mounted on semi-elliptical leaf springs as on earlier 40/50 hp models, but the rear axle was now also mounted on semi-elliptical springs instead of cantilever springs.
 This, along with the drivetrain changes, allowed the frame to be lower than before, improving the handling.
The 4-wheel servo-assisted brakes from the Phantom I were continued, and the Bijur centralized lubrication system from the Springfield-built Phantom I was included on all Phantom II chassis.

The standard wheelbase of the Phantom II was 150 inches (3,800 mm).
A 144 inches (3,700 mm) short-wheelbase chassis was also available.

A total of 1,281 Phantom II chassis of all types were built.
The chassis of the Phantom II was completely new.  The front axle was mounted on semi-elliptical leaf springs as on earlier 40/50 hp models, but the rear axle was now also mounted on semi-elliptical springs instead of cantilever springs.  This, along with the drivetrain changes, allowed the frame to be lower than before, improving the handling. The 4-wheel servo-assisted brakes from the Phantom I were continued, and the Bijur centralized lubrication system from the Springfield-built Phantom I was included on all Phantom II chassis.
The standard wheelbase of the Phantom II was 150 inches (3,800 mm). A 144 inches (3,700 mm) short-wheelbase chassis was also available.
A total of 1,281 Phantom II chassis of all types were built.
Rolls-Royce Phantom II