Dubonnet suspension

The wheels themselves were mounted onto stub axles, suspended by self-contained suspension units outboard of the kingpins.

The system featured an encased coil spring and shock absorber, which sealed in the oil needed to lubricate and protect the suspension parts.

One advantage for a comfortable ride was the reduction in unsprung weight, as the kingpins and steering gear were inboard of the suspension, and not thus counted as sprung mass.

[i] The mass of the driving axle was greater but with the softer springs of the lightweight front suspension,[ii] their frequencies became comparable.

[7] However this suspension used torsion bars rather than coil springs and so Vauxhall themselves denied that this was the 'true' Dubonnet.