I am doing some up grades on my 98 FLHRC. I have purchased a 21" wheel for the front. The problem is the recommended size tire for this bike does not have a load rating that fits the specs of the bike. The tire size for the wheel is 120 70r 21 but the highest load rating I can find is 68 (694lb) and the dealer ship says I need some thing around 70 (739lb). They tell me I need over 725lb or they will not mount it. Anyone have any experience with this?