It isn't really possible to give you an accurate answer without knowing the measurements of your 5th wheel are. If you do not know how/where to measure for new steps, you just need to measure the width of your current step assembly, and, followed by height from step to step; and finally, take a measure center of the step assembly at the top at the cross bar and make a diagonal line straight down to the edge of the bottom stair.
With those measurements in hand, I can properly give an... view full answer...