3DVision writes:
Car-Rig Pro 2.1 is now available, A test version is now available for only 1$, this version gives you an overview of 30% of the possibilities of the rig, so you can choose to get the full version after this test.
Car-Rig Pro is the only Rig that offers automatic centrifugal force, automatic drift, automatic steering wheel, automatic terrain detection and tilt, so you don't have to make any effort for animation.
With version 2.1 you can choose between two types of suspension, Dependent or Independent. Bones for shock absorbers and drive axis are also available.