Ecoboost mpg 20 wheels
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Old Grey Mule (01-29-2019)
01-29-2019, 06:11 AM
#2
Mark
iTrader: (1)
01-29-2019, 07:34 AM
#4
Senior Member
I don't know...
When I was looking for wheels tires for my RCSB.. I did a lot of looking at 18" vs 20" wheels/tires.
what I found, was that it was very close in weight for wheels/tire packages that when done had the same tire diameter. For instance....
I purchased XD grenade 135 in 20" for my wheels and then a 275/55R20 tire. If you look at Nitto Graps. the tires in 20" weigh 45.5 lbs. the same (within 2 tenths.. I think it was a 275/60R18) time for an 18" wheel is 47.5. so very close. I'm not sure you will notice 2lb differences. the wheels were within 5lbs in weight each as well. so, less than 40 pounds total (all 4 corners) will be there. Gas should not be much different between the two.
If one gets a larger diameter wheel - but has close to same offset and backspacing.. and then does not change overall diameter (or size of the tires. I would think it would be pretty much really close to stock gas MPG. question was about wheels only.. not updating tire size. I would guess they would be doing that.. But we would need more info .. as maybe it's from being in the service.. but I don't assume much of anything at this point in life. :-)
If you are changing wheels and then increasing tire size also. Sure, I would agree.
I went from a 30.5" diameter to a 32" diameter - basically I lost about 1.2 MPG in my daily commutes. but not sure I would have lost as much if I stayed with same overall size tire.
When I was looking for wheels tires for my RCSB.. I did a lot of looking at 18" vs 20" wheels/tires.
what I found, was that it was very close in weight for wheels/tire packages that when done had the same tire diameter. For instance....
I purchased XD grenade 135 in 20" for my wheels and then a 275/55R20 tire. If you look at Nitto Graps. the tires in 20" weigh 45.5 lbs. the same (within 2 tenths.. I think it was a 275/60R18) time for an 18" wheel is 47.5. so very close. I'm not sure you will notice 2lb differences. the wheels were within 5lbs in weight each as well. so, less than 40 pounds total (all 4 corners) will be there. Gas should not be much different between the two.
If one gets a larger diameter wheel - but has close to same offset and backspacing.. and then does not change overall diameter (or size of the tires. I would think it would be pretty much really close to stock gas MPG. question was about wheels only.. not updating tire size. I would guess they would be doing that.. But we would need more info .. as maybe it's from being in the service.. but I don't assume much of anything at this point in life. :-)
If you are changing wheels and then increasing tire size also. Sure, I would agree.
I went from a 30.5" diameter to a 32" diameter - basically I lost about 1.2 MPG in my daily commutes. but not sure I would have lost as much if I stayed with same overall size tire.
Last edited by whoch; 01-29-2019 at 07:40 AM.
01-29-2019, 07:49 AM
#5
Super Duper Senior Member
Tire choice is going to impact MPG's way more than wheel size.
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techrep (01-29-2019)
01-29-2019, 08:38 AM
#6
Mark
iTrader: (1)
01-29-2019, 09:02 AM
#7
Senior Member
Different MY and have the 3.5EB with OEM 20's, getting around 20-21 on the interstate at the speed limits. I did adjust the whatchamacallit to be a bit more accurate. 
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01-29-2019, 09:05 AM
#8
Our 16 2.7 Eco gets about 21.4 in town, taking it easy. Highway we see 24 usually, going about 70. Stock factory 20's
01-29-2019, 10:33 AM
#9
01-29-2019, 10:45 AM
#10
