Thanks LJ Lawns for the tire info. My current tire size on my Walker is 18X9.5X8. If I put 18X8.5X8 tires on it, what kind, if any, problems will I have? Are there any modifications needed ? The 8.5 tires are easy to buy around here but 9.5 tires are rare and have to be ordered. I would like to go to a stock size so I could get replacements easier. Thanks.