That's certainly how the Bachman Radial Tank works (minus any side control), but a full size radial 'truck'* isn't really a truck at all. Rather, the axleboxes are allowed to move sideways in specially shaped hornguides fixed to the mainframes that cause the wheels to steer just as if they were mounted on a Bissell truck, so the axle hence remains 'radial' to the track curvature.
The Cartazzi axleboxes used on Gresley Pacifics are radial boxes with side control provided by inclined planes on top where the loco's weight is supported, but radial axles were very widely used in tank engines with a leading and/or trailing axle (0-4-2T, 2-4-2T, 0-6-2T etc) and I don't know what, if any, side control most designs employed.
* Look up 'radial truck' on Wikipedia and you'll find a description of a bogie with multiple steering axles that isn't quite the same thing.