I have spent the last two hours looking for information on what wheels will work on 3rd gen 3500 single rear wheel trucks. I searched TDR and found that the correct backspace is around 6", 42-45mm positive offset. I can't find any wheels with a 6" backspace for sale. I see a lot of custom wheels on local trucks, but I'm pretty sure they are not the correct backspace. I did find a reference to Weld wheels Cheyenne 878-785950. It is not listed on the Weld web page. I will call them on Monday morning to see if it is still in production. So what are you all putting on your trucks?