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I just added a 1.5" level to my truck, and now the stock tires are looking a little small. I want to move from the stock 275/65r18 (32s) to 275/70r18 (33s). My current tires are the General Grabber AT2s and I love them. My dilemma, is ride comfort and MPG are very important to me, so I want to stay with a P rated tire, which severely limits my options. There's plenty of P-rated tire options in the stock size, but only 2 options in the 33s: General Grabber APT and BFG Rugged Trail. Out of the 2 I decided I like the General Grabber APT.
The APTs are classified as "different tread, Nissan" and come stock on the Nissan Titan XD's. Wanted everyone's opinion on what tires I should go with...
1) Stay with stock size General Grabber AT2s
2) General Grabber APT P-rated 275/70r18
3) 275/70r18 LT tires with much more options
The weight of the tire won’t have nearly as much affect as the height of the tire. The 33 inch tire will have less revolutions per mile. This may fool you into thinking your fuel mileage is suffering but in most cases it really won’t. From what I have seen in several fords I have owned the odometer is typically inaccurate with OEM tires. I suspect they put on a slightly smaller tire which on the electronic fuel mileage gauge makes it appear you are getting better fuel mileage than you actually are. This can be verified by hand calculating fuel mileage when you fill up. Additionally you can check with GPS or mile markers on the freeway and will most likely find a slightly lesser reading than the actual mile marker. Usually up to about 1/10 mile.
I just put new Michelin’s in a 32.8 height vs 32.2 from OEMs. At least according to mile markers and gps it appears to be closer. Once you get into the 35’s though you can see slight throttle lugging and towing can be affected as this also changes gear ratios. Best of luck.
Anytime you increase un sprung weight you will reduce your mpg. There is no real formula to know what it will be.
IMO, simply going from a 65 to a 70 in height tire isn't going to be noticeable to anyone but you. Wear out your current tires and then buy what you think works best for your situation. Either way, if you're thinking about gas mileage compare the weight of the tires and go for the lightest tire possible in the size/look/category your looking for.
To keep the speedo accurate you can do that with FORScan. Check out the sticky at the top of the page.
Either way, if you're thinking about gas mileage compare the weight of the tires and go for the lightest tire possible in the size/look/category your looking for.
The APT 33s are actually 1 pound lighter than my current 32 inch all terrains.
06-23-2018, 07:28 PM
Help me pick between these tires
