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MPG after Ridge Grapplers or Worse?

Discussion in 'Wheels & Tires' started by treihing, Aug 13, 2017.

  1. Aug 13, 2017 at 8:48 AM
    #1
    treihing

    treihing [OP] MAGA

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    Good Morning Everyone-

    I have had my Ridge Grapplers for a month and a half or so now and since I have had them, my mileage has taken a dive. When I got my truck in May I was sitting between 15mpg and 16mpg. After I added my Grapplers, I am sitting at just above 11mpg. Is this typical for adding LT tires or could it be something else? The only other mods since my Grapplers are my TRD Air Intake and TRD Rear Sway Bar.

    Thoughts?

    TR
     
  2. Aug 13, 2017 at 8:50 AM
    #2
    COMiamiFan

    COMiamiFan SSEM #3. Don't forget to try the search bar. #PSL

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    Computer "settling" the MPG the more you drive it too. Not all associated with the tires.
     
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  3. Aug 13, 2017 at 8:55 AM
    #3
    gosolo

    gosolo “The .com stands for communist”, Dale Gribble

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    What was the size of the tire you were running before the grapplers?
    Is the only change the tread design or did you go taller and wider also?
     
    treihing [OP] likes this.
  4. Aug 13, 2017 at 9:03 AM
    #4
    treihing

    treihing [OP] MAGA

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    My truck was totally stock running 275/55r20 Duelers before the Grapplers which are 295/55r20.
     
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  5. Aug 13, 2017 at 9:14 AM
    #5
    gosolo

    gosolo “The .com stands for communist”, Dale Gribble

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    You have several things happening.
    You no longer have an accurate reading of your speed and mileage because your larger diameter tires will cover a little more distance each time they turn. This can be recalibrated.
    Next, you will have an actual reduction in true MPG from decreasing mechanical advantage (less hp at the wheel) reduced traction (less rubber in contact with the asphalt) and increased wind resistance because the truck now sets higher and the engineered air flow geometry has changed.
     
  6. Aug 13, 2017 at 9:18 AM
    #6
    treihing

    treihing [OP] MAGA

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    Thanks Brother. Another reason why I love this forum.
     
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  7. Aug 13, 2017 at 9:26 AM
    #7
    gosolo

    gosolo “The .com stands for communist”, Dale Gribble

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  8. Aug 13, 2017 at 9:28 AM
    #8
    Jsena

    Jsena Trend setter, not a follower!!

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    7 inch BDS LIFT, 22x10 RBP wheels 37 inch Atturo MT Tires, Flowmaster, Bullydog Tuner
    I went from 15 mpg when stock, I put 37's in my truck 3 weeks ago and I'm getting about 12mpg now... lost about 3mpg now, I'm getting the 4.88 gears soon.. I've been told that will help with gas and pay for itself within the year..
     
  9. Aug 13, 2017 at 9:42 AM
    #9
    gosolo

    gosolo “The .com stands for communist”, Dale Gribble

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    If you're driving 15,000 miles in a year at 3$/gal gas you will save $750.
    What price were you quoted for the regearing?
     
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  10. Aug 13, 2017 at 9:44 AM
    #10
    Jsena

    Jsena Trend setter, not a follower!!

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    7 inch BDS LIFT, 22x10 RBP wheels 37 inch Atturo MT Tires, Flowmaster, Bullydog Tuner
    Where did you come up with those #'s??? And yea I ended up finding a guy who all my friends use.. $500 for gears and bearing ans $300'labor $800'
     
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  11. Aug 13, 2017 at 9:54 AM
    #11
    gosolo

    gosolo “The .com stands for communist”, Dale Gribble

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    Pretty simple math; take the 15000 yearly miles, divide by 15 (miles per gallon) and you know you're using 1000 gallons per year. At $3/gallon gas it's $3000.00. Do the same thing divided by 12 (miles per gallon) and it's $3,750.
    If i keep the numbers even like these it's easy to do in your head.
     
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  12. Aug 13, 2017 at 9:58 AM
    #12
    Jsena

    Jsena Trend setter, not a follower!!

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    You smart guys lol, never would have thought of that.. well I'll get an increase of mpg when new gears come in.. thanx brofessor
     
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  13. Aug 13, 2017 at 3:46 PM
    #13
    bobeast

    bobeast really old member

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    - Bull Bar - LED Bunny Burners - AMP retractable running boards - Headlight leveling retrofit - P3 Brake Controller - 60% rear seat delete - relocation of Sub to rear wall - Bilstein 5100 x4, top setting with 2 shims per side - Coach builder +2 rear shackles w/carrier bearing drop - Firestone Air bags - on-board compressor with auto-leveling - Dual Undercover Swing Boxes. - P285/65/R20 (34.6") BFG TA KO2's - TRD Front skid plate - Pop & Lock Tailgate lock - Remote Tailgate mod - LED Headlights - Nav Bypass - iPhone integration - Serius/XM retrofit - 25% front tint - Bizon electric tonneau cover - Power folding tow mirror upgrade - 2010+ leveling Headlight mod - Auto-fold mirror mod. - one-touch lane changer mod - Flash to open garage opener mod - Rigid H/L fog light upgrade - Pushbutton / Remote start mod.
    That will move your power band closer to what it was before the swap, but your odometer will still be off. You need to install a speedometer calibrator in order to be able to trust what your computer is telling you.
     
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  14. Aug 13, 2017 at 4:35 PM
    #14
    Jsena

    Jsena Trend setter, not a follower!!

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    I don't care about my speedometer lol..
     
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  15. Aug 13, 2017 at 4:51 PM
    #15
    gosolo

    gosolo “The .com stands for communist”, Dale Gribble

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    This might not be the best thing to say when you get pulled over for speeding! lol
     
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  16. Aug 13, 2017 at 4:52 PM
    #16
    Jsena

    Jsena Trend setter, not a follower!!

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    True, but I did the speedo test app and it's like 7mph off. So I kinda have that in my head
     
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  17. Aug 13, 2017 at 6:15 PM
    #17
    Netmonkey

    Netmonkey Don't be a Dumbass

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    Icon stage 2 lift, 295 60 20 nitto ridge grapplers, fuel kranks, TRD dual exhaust, TRD rear sway bar
    That's what I did too. I went from 275/55/20 to 295/55/20 ridge grapplers. I checked the speedometer with my gps before and after the tire swap and, with the 295's, the speedometer is now accurate. I also lost about 1.5 mpg. I went from about 16.5 mpg to 15.0 mpg.
     
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  18. Aug 13, 2017 at 11:20 PM
    #18
    TRDpro619

    TRDpro619 Follow My Build on Instagram:TRDorcaTUNDRA

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    What gears are you getting for $500?! And wow $300 for labor I was quoted $1500... lol I'll drive for Vegas in a heartbeat for that deal
     
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  19. Aug 13, 2017 at 11:32 PM
    #19
    Jsena

    Jsena Trend setter, not a follower!!

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    $300 labor.. this guy in Vegas used to own audio excellence.. sold shops and does mechanic work out here.. I went to his shop the other day when my buddy was having him install some shit on his truck.. gears ans mini bearing kit was like $500 so that's what's up.. also my truck is 2wd so no need for front
     
  20. Mar 6, 2019 at 9:07 AM
    #20
    Bluechord04

    Bluechord04 New Member

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    I put on 275/60 20s on Furl Assault 20x10s, and I feel like mine has plummeted. I would estimate my speedometer is probably off only by 3 mph or so, but not sure how impactful this has actually been on fuel economy
     
  21. Mar 6, 2019 at 11:34 AM
    #21
    Baldmonkey22

    Baldmonkey22 New Member

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    I did 295/60/20 RG's and im about 12.5-13mpg when i used to be able to get about 14-14.5mpg on the same drive.i dont think much of it because the computers calculation is off. now for instance i know my commute is 5.9 miles but now after the tires it reports i only drove 5.6 so the truck is supplying the same amount of fuel to the engine per trip but it thinks its traveling a shorter distance therefore the illusion of worse than expected MPG
     

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