I have done more research and i think i can better explain what i need to know. Will a 12x16.5 tire mount on a 8.25x16.5 rim without any problems. based on what i have read a 12x16.5 tire normally mounts on 9.75x16.5 rim. i have a 751 which came with 8.25x16.5 rims and 10x16.5 tires. Thank you