The 8880 supercar was unique in official Lego history in that it offered drive, steering and suspension to all four wheels.  However, use of the specialised parts from this model is not always convenient.  In my case it is impossible, as I do not own an 8880.  So, I have built the following prototype, which combines drive, steering and suspension, just as in the 8880.  However, similar principles could be used to build a vehicle without suspension, and I also have a live-axle solution formulating in my mind!

The main problem with the design is the distance from the wheel to the inside universal joint.  This is quite large, which would result in an unacceptably wide model.  However, using some of the techniques described on Fredrick Glockner's site (see Links page) could reduce this.  As mentioned previously, removal of the suspension function, or use of a rigid live-axle, would overcome this problem too.

However, I am still pleased with the relative compactness of the design, which fits neatly within the 8448 wheel.  The large recess in these wheels help a great deal with keeping the steering pivot point relatively close to the centre line of the wheel.  This helps to keep the required steering effort low, and also minimises the tendency of the wheels to sag under load (i.e. negative camber due to flexy Lego!)