The rise on this Lippert 353620 is about 1/2". I apologize for the misleading information on our part. I am having my website team work on fixing this right now to state the updated information. I will include a screenshot of the spec sheet that lists all of the measurements. This should help you decide if it will work for you. Keep in mind that the spec sheet has 4 steps specs on it, so make sure that you are looking in the column that says single 30" step.