Okay, now that I've done my homework and am intimately in a zen like state with the ideals of roll steer (rear steer), what it is, and what causes it, my question to those in the know is;

In laying out my four bar link rear suspension, should I design any roll steer in? If so, should it be roll understeer or roll oversteer and what percentage?

Or should I keep the roll steer neutral and not design any in?

This vehicle will see its fair share of off road duty, but it will also be expected to serve DD duties (read: not a trailer queen).

Thanks in advance!

cm "please don't ... steer ... me wrong, BWAHAHAHA" k

Go for zero roll steer, if you can. Anything else will tend to make it more unpredictable. You will end up with some, almost guaranteed, but the less, the better.

Edit: I changed my mind. The more roll-steer, the better. That way, when you corner on-road, the body roll will tend to tighten your turning circle, which in turn will increase your body roll, which will in turn tighten your turning circle again. Eventually you'll turn into a spinning top, then disappear into the black hole you just created. Say Hi to Auntie Em for me!

I Lean is on the ball. If you can design it with out why wouldn't you? I just don't see how rear steer would be a desirable characteristic.

I know on road cars generally design some roll steer in to assist in cornering, particularly at high speeds.

Obviously, our rigs aren't gonna' be cornerin' at 0.9g. I just want to make sure that I'm not missing an important trait necessary for good on road manners.

cmk