I don't remember off hand, I have the set burried in storage right now.
It is just not the offset it is a bunch of things that Rich Bogart had to do to get them to work. The center drop, the hub spacing, ect, ect.
He had to buy a spun forged 10" rim and split it and then put the pieces back together, to end up with a 7 3/8" wide wheel.
Bogart notmally makes/spins their own parts. He does not have 18" dies so they are acquired out of house. The company that made them is in bankrupcy tight now and the other company that makes rim outers does not have the correct configuration to make the wheel possible.
I am a Bogart dealer and a friend of Rich Bogarts, and that is the reason he made the pair for me to start with, as they were a real pain in the butt to make.
I have a standing order for 4 more pairs of wheels but we cannot get the necessary parts, Bogart is willing to make the wheels for us but it cannot be done at this time.
We are checking repeadly for availablity of parts; but as with a lot of Viper truck stuff, it does not exist.