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Hey Folks,

I have a 2017 SCAB 3.5 ecoboost w/ 3.55 E- Locker

My truck came with 18" wheels but I just scored a set of 20" KR takeoffs on here. So now I need rubber!

I'm thinking I should probably size up since I have to buy tires anyway. I feel like the Duratracs are a better move for me over the KO2 because they come in standard load and will be lighter. I don't tow and I'm honestly buying these tires more for looks and maybe a yearly drive on the beach. I also don't want to slaughter my gas mileage. Will I see a drop if I size up? Also I was figuring I'd just buy some takeoff tpms sensors on ebay for $50 so I can keep my old wheels and tires intact.

I guess my real question is....will I notice a drop in fuel economy and a change in performance? Also...the bigger duratracs I've got a price of $878 mounted and balanced out the door from a local tire shop.

Thanks all!

tenx82

No reason not to size up. There will be a very small hit in MPG & performance with the larger, heavier tires. Likely not even noticeable though. I have a 2018 Scab 2.7 w/ 3.55 locker and went with 275/60r20 Pirelli All Terrain Plus, and there's no noticeable difference from my stock 275/65r18 Michelins.
When going to a 275/60, remember to add 3% to your trip meter when calculating your MPG.
Also, you can get new TPMS on Amazon for $18/ea. (sorry, can't link at work)

Side note: Have you considered the Goodyear Wrangler TrailRunner AT? Looks-wise it's a "DuraTrac Lite", it weighs 3 pounds LESS than the stock 275/55 Hankooks, and has a slightly longer tread warranty than the DuraTracs. I was planning to run these, but got a sweet deal on the Pirellis.

PARIAH

There will be some penalty with MPG and perhaps navigation, but what price beauty?

Also, if the beach is sand don't expect the Duratracs to perform well.

HPDMotor

I found that when I went from the stock 55 series to a 60 series tire my speedo read accurately as compared to on the low side before. I noticed a drop in MPG according to computer, but, I'm guessing it is now more accurate.

Neil

blkyukon

I went +1 on 18" tires and my speedo was actually closer as well

gingrbredman

If you are looking for just gas mileage, then a 55 series in a similar weight will get you there. If its just about gas, then that's an easy choice. But if you are looking for a little more look, and want an aggressive tire, you will sacrifice a little gas for the pleasures of a bigger tire and the looks of it.

I am going to go from an 18" to a 20" and had the same debate, with myself, over and over. Decided I want the up size, and found a set of Michelin Defenders in the 60/20 are slightly heavier than the stock. Different tire than you are looking at for sure, but had to talk myself into the tires. A 55/20 can be the easiest choice if you want a similar tread/tire as the stock. But you are looking for a "better" performing tire so I would say pick the one that you like the best and that hits you MPGs the least.

Sgb020

iknfixit

tenx82

So far, so good. I can't tell a difference in the ride compared to the stock 275/65R18 Michelins.