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Lee: K-Mo has given you good advice about tire profile with respect to rim width. I have 12.4x28s on my MF-35 and they are about right for the tractor. I could probably go to 13.6s but the wider tires will reduce fender clearance a bit, which could cause a problem if you have your rims set in close and/or use tire chains. Since you were cleaning out the barn, I suspect that you have a loader on your tractor, and your tires are probably loaded. The 13.6s will hold a bit more fluid then 12.4s at the expense of fender clearance and cost. Another thought is the apparent recent reduction in tire size by at least some manufactures. The 10 year old 12.4x28 Armstrongs that I have on my 8N and my MF-35 (both with 10" rims) measure the exact same width as the 13.6x28 Firestones that I bought this year for my Ford 4000 four cylinder with 11" rims. The 10 year old 13.6 Armstrongs that are on my Ford 860 (with 12" rims) are a full 1 1/2 inch wider than the new Firestone 13.6s. It seems to me that Firestone is downsizing their tires to save materials. I am very dissapointed with the new Firestones and will not buy any more of them. Finally, if you load your new tires, I suggeest RimGard. It is made from beet juice and is non corrosive and heavier than CaCl. Dean
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