I took some time today to do a test fit of those big 295-50s. I tucked one on the back of the Satellite just to make sure all my measurements for the backspacing on the rim and the tire size were accurate. The answer is, YES! They are going to fit perfectly, and look great on the Road Runner. Here ya go!
You can't quite read it in this picture, but that's dead on 3/4" clearance between the tire and the spring.