I have 2 old style MTRs I just took off my truck. They work great still Offroad, but caused vibrations at highway speed. After sitting for awhile, they would get out of round. I grooved the center tread block to the same depths as the outer tread. I'd like $75 each. I have two left. I'm located in Humboldt County, but I will be in the Sacramento area on the evening of the 9th. If interested, I can send more specific pictures.