37" and 22's or 35'' and 20's - Ford Powerstroke Diesel Forum
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post #1 of 25 Old 01-14-2009, 09:16 PM Thread Starter
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37" and 22's or 35'' and 20's

I have an 2008 Ford F350, and im installing a 6'' lift. I need help with witch wheel and tire setup to go with 37'' tires with 22's or 20's? Also if i go with 37" tires over 35" with i notice a big diffrence in mpg? If you know where i can get a good deal let me know. Thanks
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post #2 of 25 Old 01-14-2009, 09:26 PM
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Originally Posted by Boise,Id View Post
I have an 2008 Ford F350, and im installing a 6'' lift. I need help with witch wheel and tire setup to go with 37'' tires with 22's or 20's? Also if i go with 37" tires over 35" with i notice a big diffrence in mpg? If you know where i can get a good deal let me know. Thanks
if you do any kind of wheeling would go with 20's so you can air down the tires...

i can get you a good deal on wheels, tires, and lift kit if you havnt decided on which one too go with yet....

-Raul
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post #3 of 25 Old 01-14-2009, 10:13 PM
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For a 6" definitely 37" tires. As far as rim it's a personal preference...I personally like 20" wheels on tires 38" or less. If you plan on doing any real offroading the more sidewall the better as well.


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post #4 of 25 Old 01-14-2009, 10:48 PM
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37's with a 6 inch lift is the way to go. I have 22's and enough side wall to air down if needed without risking damage.

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post #5 of 25 Old 01-14-2009, 10:50 PM Thread Starter
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What are you getting for MPG with your 37" tires. Thanks
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post #6 of 25 Old 01-14-2009, 10:59 PM
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I'm getting 11.5mpg in the city and up to 14mpg on the hwy, i have no tuner or engine mods.

2012 Ford Raptor SCrew
2008 Lariat Crew 6.4 4X4 (SOLD)
H&S Mini Max, Banks Intake
Diamond Eye 5" DP back
8" Pro Comp StageII
37" Toyo MT's on RBP 22's
2011 Ducati 848evo
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2006 Suzuki GSXR-750 (track bike)
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post #7 of 25 Old 01-15-2009, 05:41 AM
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35's are way too small for a 6" lift on an 08

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As far as actual HP numbers I have no idea. It don't snap your neck but.....It feels good.
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post #8 of 25 Old 01-15-2009, 07:06 AM
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Originally Posted by MotoHauler View Post
I'm getting 11.5mpg in the city and up to 14mpg on the hwy, i have no tuner or engine mods.
How are you calculating this MPG? I have 35" tires on a similar stock vehicle, and i'm just barely hitting 10.9 MPG. My factory lie o meter has been recalibrate, but it's still off by several revolutions, so with your 37" tires, you can't be calculating this number by looking at either your odometer, or the lie o meter.

I made my calculations by using a GPS to calculate total mileage for an etire tank, since my odometer / speedometer / lie o meter are all off now.

Just curious because I've heard lots of folks with DPF and tuners getting much better mileage than I am, but you are the first who is running a stock vehicle and claiming better mileage with even larger tires. What gears do you have installed??

Thanks
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post #9 of 25 Old 01-15-2009, 07:28 PM
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Quote:
Originally Posted by jbiersba View Post
How are you calculating this MPG? I have 35" tires on a similar stock vehicle, and i'm just barely hitting 10.9 MPG. My factory lie o meter has been recalibrate, but it's still off by several revolutions, so with your 37" tires, you can't be calculating this number by looking at either your odometer, or the lie o meter.

I made my calculations by using a GPS to calculate total mileage for an etire tank, since my odometer / speedometer / lie o meter are all off now.

Just curious because I've heard lots of folks with DPF and tuners getting much better mileage than I am, but you are the first who is running a stock vehicle and claiming better mileage with even larger tires. What gears do you have installed??

Thanks
my calculations are off my gps, and odometer. my odo is 10% off, and always matches my gps as such. my lie o meter as you so cutely call it has never been more than .3mpg off. I routinely see 11-12 in town, and 13.5-14.5 highway with my 37's, I have seen as low at 9.5 intown and 12highway, but not the norm

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post #10 of 25 Old 01-15-2009, 10:27 PM
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Quote:
Originally Posted by jbiersba View Post
How are you calculating this MPG? I have 35" tires on a similar stock vehicle, and i'm just barely hitting 10.9 MPG. My factory lie o meter has been recalibrate, but it's still off by several revolutions, so with your 37" tires, you can't be calculating this number by looking at either your odometer, or the lie o meter.

I made my calculations by using a GPS to calculate total mileage for an etire tank, since my odometer / speedometer / lie o meter are all off now.

Just curious because I've heard lots of folks with DPF and tuners getting much better mileage than I am, but you are the first who is running a stock vehicle and claiming better mileage with even larger tires. What gears do you have installed??

Thanks
I have checked my speedo against a LiDar and found it to be off about 10%. So I have been using my odometer (adding 10%) and the number of gallons on fill up. No GPS or other special tools, it may be off somewhat but those are the figures I have. BTW I have 3.73 gearing.

2012 Ford Raptor SCrew
2008 Lariat Crew 6.4 4X4 (SOLD)
H&S Mini Max, Banks Intake
Diamond Eye 5" DP back
8" Pro Comp StageII
37" Toyo MT's on RBP 22's
2011 Ducati 848evo
2006 Ducati Xerox 999R #46
2006 Suzuki GSXR-750 (track bike)
2011 Audi A4
2005 STI

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