My experience with tires tells me do not put anything less that the manufacture of the unit rec. If anything go one higher if possible. Yes you may pay a bit more but how much will it cost you if you are broke down on the road. Talk to the manufacture of you unit and see what they recommend. I put tire that were not manufactured in the USA and had tire failure several times. It causes a great deal of damage to your unit when one lets loos. Just saying
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