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Yes Sailun makes the 17.5 tires 215x75x17.5 and i believe the 225x75x17.5 in load range h which is 16 ply. With the higher capacity tires in 16'' now i don't see any reason to increase to 17.5. I replaced my wheels with Hi-Spec wheels on account of breaking 2 factory wheels and stayed with the 16''. If i had a Mobile Suite 5th wheel then i would have 17.5'' wheels as this is what they come with and they are much heavier.
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