Gas mileage after 35s and 4 in lift

[topgear1224]

So update after drive....
800 miles a few weeks ago with stock 275/60/20. Avg 18.9 mpg speed around 73

tonight 800 miles 35/11.5/20 nitro ridge 4 inch sst lift (which looks great I’ll post some pics once I clean the car from the billion flies once I hit the Michigan border). 16.8 mpg avg speed around 75

 
not as bad as I thought for hwy, in town more like 14-15 before was 17....
 
putting the Hypertech on tomorrow when it gets to the in-laws and I’ll update after the ride home.
 
 
thanks for all of your insight!

Wait you fit 35s on a serria with a 4 inch?

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[Black18WT]

On 6/30/2020 at 3:31 PM, balaraform said:

New to trucks and lifts but noticed I went up to 35s with a 4in lift on my Sierra and dropped about 15% in mileage....roughly 3.5 mpg...is that a normal drop?

Got any pictures of the truck you could post?

 

What brand/model tires did you put on? Must be LT? 10 ply tires, load E usually, are much heavier than P rated SUV/Truck tires. I think almost all 35s are LT rated tires and technically built for HD/1 ton trucks basically, and built for way more than a half ton can even carry. Theyre strong but 20-30lbs heavier per tire. That's a LOT more weight to spin for the engine. Theres a few lightweight 33" P rated tires and maybe a couple in 34", but all 35" I know of are the much heavier LT.

 

On my 2018 when I went from stock tire to LT rated 33" tires and a 2" level I lost about 10-15% of my gas mileage and a bit of acceleration too. I've got a NBS 2019 now and been looking around on what kits best. Cant decide between a 2" level or a 3-4" kit.