I can understand you not wanting to spend money on 17's when you have good tires. Don't make that decision on based on the misconception that 17's will give you a bad ride. I have had trucks with 15's, 17's, 18's, and 20's. The size of the wheel has nothing to do with the ride. It's the profile of the tire that matters. Add a set of 17's with a 45 series tire and your ride will be just fine....