If by chance you have the 64 wheels currently on the truck your local tire dealer will be able to give you some viable tire size options.

Summit Racing sells a measurement device that is attached to the hub that gives you an idea about backspacing, offset and tire aspect ratio if you don't currently have rims. It's pricey but so is guessing wrong and having a set of wheels and tires all mounted up that won't fit and you can't turn back in for a refund.

Getting proper fender/frame/tierod clearance and the "right" look for your ride is often under-estimated in importance. With the combo you have, you'll probably have a problem getting specific info that will solve your application difficulties.

Dave


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