The tubeless front wheels were already on my truck. I changed the back wheels becuase I needed new tires. The locking ring is so dangerous it cost big money to change the tires. I have no idea what truck my rear wheels came off of. The tire company had a used set and said "try them". They just happen to work fine even though the offset was slightly different. They did however look to be exactly the same offset as their 1974 1 ton truck they use to haul off old tires. Wish I could help more.
