American Farmer 6.40-15 American Farmer Rib Implement Tire 4 ply 6.40-15 American Farmer 4 Ply Rib Implement Tires Used on many types of farm implements. This tire can also be use on Dune Buggy & Sand Rail. This 5-rib implement tire allows great turning control in sand while running... $121.85 Add to Cart