The Honda Ridgeline uses unibody architecture ladder frame / unibody hybrid chassis. Honda claims this design gives it 2.5 times more bending rigidity and 20 times the torsional rigidity than the standard ladder frame only type of chassis construction, while retaining the load carrying capacity of the traditional ladder frame.
Independent rear suspension
The truck also boasts four-wheel independent suspension which, coupled with the unibody design, provides a new level of stable and sure handling under load well beyond that which could be achieved with older platforms.
A pickup with a trunk
Another advantage of the independent suspension is that it opened up enough space for Honda to create the first pickup truck to include a storage trunk below the bed, which can be locked to secure contents, such as a tool chest. This creates the unfortunate problem of having to remove most of the bed contents (a serious problem when hauling top soil or other granular materials) to change a flat tire, as the spare is located in this trunk. The bed also comes standard with a composite liner that resists dents, corrosion, and can easily be hosed clean. The trunk has drainage holes to allow wash water to flow out.