Thank you for the post. We would be happy to help you with your tire needs.
We do not stock the SAT KL61 at this time. We should be able to order this model in however they do not have any applicable sizes for your PRO-4X.
Your truck comes stock with tire size 275/70-18 and the SAT KL61 in 18" only comes in sizes 275/65-18 and 265/70-18. Both of these sizes are shorter in rolling diameter when compated to your stock size.
In your stock size, an excellent model that is comparable to the SAT KL61 that you should look into is the Goodyear Wrangler Silent Armor. Please note that this size/model is LR-E like most of the models produced in this size. Here's the link with more details...