These are converted American racing aluminum wheels with aluminum beadlocks- conventional one sidedThe simple answer is it depends on the rim & tire. What brand beadlock are they? And some tires have a thinker bead that others so that can change how you mount them.
Cindy and I recently installed an all new Dynatrac XD60 front axle in a 72.5" with PRO 1550 steering knuckles but to take advantage of all the benefits this new setup has to offer, we needed to run 40" tires mounted on wheels that have 5.5" of back spacing. Needless to say, we picked up a set...www.wayalife.com
Hope this helps a little. The ones I'm doing right now are dual beadlock rims which is a totally different animal.