Tires profiles and sizes - the pros and cons

[Longsnowsm]

Sorry, I should have explained what I meant about the decision getting made for me. The dealer decided before I managed to get out to see the truck that he would replace the tires. I had no idea that he was going to replace them since I hadn't seen the truck, but he did tell me before I left that the truck needed some tires. So when I got there I was still expecting that the truck would need some tires when I got it back home. Well to my surprise the dealer went ahead and replaced the tires before I got there so when I arrived the truck had brand new tires. While I was surprised that he did this since I was expecting to have to do this myself I am happy that he saved me the money of having to buy the tires. The price we had negotiated stayed the same so it was a win win in regards to getting a new set of tires and I didn't have to pick up the tab for them.

The downside is like I stated. While he did choose a pretty nice set of tires they just aren't the ones I would have chosen myself. They are a more expensive than the tire I was going to buy, and aren't rated to last as long or have the same LRR features that I was going to purchase. So there are some downsides to not getting to buy my own tires, but at least I don't have to sink money into a new set of tires now... At least not for a little while anyway.

The truck is a 4 cylinder, 5 speed, 3.73 rear diff. So I expected the RPM to actually be higher than that at 65mph. However I was also expecting the truck to be running smaller rubber in a 15" OEM size. So the larger rubber seems to help. So 65-66 mph looks to be between 2100-2150 rpm with this larger tire and I am pretty happy with that since it is better than I expected. Of course it would be nice if it was turning 2000 or less at those speeds, but unless I were to go to a seriously oversized tire or do a rear diff gear change I don't see how that would be possible unless you have some suggestions. Thanks again!