MPG of two different 35" tires - 61lb vs 66lb

[CT2M]

I’ve narrowed my tire search down to two different Load C 35" tires. I’m evaluating the impact of MPG to make a final decision.

Is there a way to determine the projected mpg of these two tires? Hoping a generous physicist or engineer might know a calculation…

2024 Tacoma TRD OR, non hybrid
Currently stock suspension but will do a 2.5 inch lift and new UCAs

Wheels: 17” Nomad Sahara 0 Offset - 27.8lbs

Tire 1: Toyo RT PRO - 35x12.5 r17 Load C - 66 lbs
Tire 2: BFG K03 35x11.5 r17 Load C - 61 lbs (BF Goodrich has confirmed they are being released in May)

How much of a difference will 5lbs of unsprung mass on my mpg?

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[krisdboard]

Shouldnt be noticable. I see people complain about 14 mpg on 35's, I can easily get 18-19 highway on 35x11.5 at4w's. I believe mine are 60ish lbs, depends on how you drive

 

[MT-Taco]

I’ve narrowed my tire search down to two different Load C 35" tires. I’m evaluating the impact of MPG to make a final decision.

Is there a way to determine the projected mpg of these two tires? Hoping a generous physicist or engineer might know a calculation…

2024 Tacoma TRD OR, non hybrid
Currently stock suspension but will do a 2.5 inch lift and new UCAs

Wheels: 17” Nomad Sahara 0 Offset - 27.8lbs

Tire 1: Toyo RT PRO - 35x12.5 r17 Load C - 66 lbs
Tire 2: BFG K03 35x11.5 r17 Load C - 61 lbs (BF Goodrich has confirmed they are being released in May)

How much of a difference will 5lbs of unsprung mass on my mpg?

Won’t be measurable.

 

[StreeTaco]

Just drive the truck, you’re overthinking it. - physicist of engineering

 

[AltarBoy]

Perhaps get a lighter wheel. 28 pounds is a bit much

 

[Un-Limited]

The rolling resistance of the tires will usually have a bigger impact. My plan is light wheels and light tires with low rolling resistance. But I'm going to wear out the originals, at least for a bit. I will say that if you like them equally, the weight diff is a good tiebreaker for your decision.

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