Boarding ladder treads

Mar 14, 2011
14
S2 9.2A Deltaville, VA
Does anybody know for sure the diameter of the stainless steel tubing used for the stock stern boarding ladder on a 9.2A? I'm making some treads for mine and I'd like to get the mounting hardware here at home before I drive up to the boat, but I need to know whether it's 7/8" or 1". Thanks.
David B.